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1 Chemisches Zentralblatt II. Half-year No. 19/20 S./15* November A. General and physical chemistry. Carl R eutersw ärd, E in new mass spectrograph. V f. Boriohtot on the construction of a new mass spectrograph, the construction of which is based on the well-known U isit / .ooscken theory of the electrostatic. u. magnet. Cylinder Linson is based. The possibility of using the magnet was examined during the construction. C ylinderlinson w ith an ion beam incident obliquely against the fold crossing as an imaging element in the mass spectrometer. After cooking it is possible to achieve an increase in intensity with the help of an inclined course of the jet in the stroke of the magnet by means of a type of focus perpendicular to the symmetry of the field. Some recordings show the good resolving power of the mass spectrograph, which is next to isotopioun torss. elements should be used on sohworon. (Ark. M at., A stronom. F y sik, gor. A 30. Nr, 7, / U pp sala, P h ysik al. In st.) N itic a R. Daudel, A new method of calculation the value (with the help of the de Brogliesclien mechanics). Their application to the study of rare earths and transuranic elements. With the help of the FERM ic M eth. to the calculator. TREATMENT OF WEEKLY WEIGHTS. between the elec trons, an atom s becomes one through N ähorungsvorff. integrable differential equation for calculating the value of the elements that is sufficiently precise to B. the differences in the former relationship that decided to explain rare earths. It is found in agreement with experience that La, N d and most of the other rare earths can only be worth 3, while Ce is worth a maximum of 4 and P d 5 must be worth it. In order to get along with a trivalent Tb for the oxide T b 2Q4, a p eroxide form would have to be assumed, which could be determined by a structure investigation. For the transuranic elements with ordinal numbers between 92 and 106, which have to form a group according to the rare earths, like Göp p e r t-m a y e r with the help of the FERMic M eth. could show, it can be predicted that they must have the same maxi mum value and that the value cannot be higher than 6 in any case. This would make the separation of these elements more difficult. (J. Chim. Physlque Physico-C him, hlol, Jan./Febr) K e itz Albert T ian, Effect of centrifugal force on solutions. Under certain test conditions (soaking of the solution through textile fabric) can also be used with molecular sparsely dissolved substances, such as B a H g J 4 and H g (c N ) 2 and cane sugar a shift in concentration in the central field (b ei g) m eat. (C. E. hebd, gdanoes A cad, Sch /) M e n ts c h e e, E. Heym ann, R. J. L. M artin and M. F, R. M ulcahy, Vertetiungsgleidigewickle wischen molten saws with regard to the ShM ity of intermetallic compounds is molten state. T he distribution curves for some metals (N a, Cd) w ith a molten metal. Phase and that of a molten salt examined and the deviations of these curves from the EAOUE law. The distribution curve of the area between melted Cd and Cd Br * z e ig t positive statements from the RAOULT law, which probably indicates that the between "a and Cd existing v erbb. at the V ersuehstem p. be disassembled. The distribution «- curve of the n ach between melted P b and melted N a B r shows, on the other hand, strong negative deviations from the PiAOUi / R esetz law, what a resilience mtermetall. V erb. between N a and Pb in fl state speaks; also the solubility of utermetal. Verbb. des N a w ith Sn, Sb u. B i in N a-h alogenidsclim elzen w ill be discussed. The distribution curve of the Cd between molten "B i u, OdCl *" shows an anomalous ^ wmium, which indicates that this curve is the ac tivity of the Cd in the m etalj ,. research does not reflect; The possible reasons for this anom alie are reapplied. Furthermore, B i is in Gw. only a little dissolve of Cd in molten salt! ,, the m axim al dushchkeit is an em atom break 0.5 ut the possible causes of this rare unity will be erö rtert. The distribution curve of Cd between melted Sb WC) represents an overlay of two equilibria, that of the free Gd ', erb. CdSb between the metal and the Salt phase. This compound is stable with the Vertn s P- (690) and soluble in melted CdCI *. () physie, Chen »Oct M elbourne, U n iv.) Hzx'raoHEZ 60

2 924 A j. A u f b u d e r M a t e r i e II. To understand the heights of the atmosphere, it is important to know which gases with the absorption bands in question are present in the atmosphere, which A absorption coefficient at the different W avelenghts these gases have, whether the emission u. Absorption spectra contin u a or line sp ects are w ith th e g ases in dif ferent. Heights also have a w hich type of g ases, such as z. B. O zon, formed or dismantled. A few details of the theses presented in the following are briefly referred to. (B ep. P rogr. P h y sics London Im perial C oll.) N i t k a A. Hunter, The solar spectrum in the far ultraviolet. T he most essential prerequisite for researching the ph otoch em y of the E rdatm osp here is the exact knowledge of the spectral intensity curve of the solar spectrum, then only with his help (from absorption measurements) can investigate the processes in the upper a tm osphere. Vf. Reports briefly on the results of the direct spectral observations above and below Á. It is expressly stated that an e xtrapolation in the UV corresponds to the course of the PLANCK to investigate the true spec tral course of the solar emission spectrum The law of black radiation is very carefully considered. Our knowledge of the origin of solar radiation is still too incomplete for this. In addition to these direct observation results, there are also ind irect methods available, which mainly extend to the interpretation of the atomic and molecular spectra. For this purpose, the measurements of the continuous spectrum of the corona and chromosphere spectrum, of comet and eruption spectra are used. One must draw the conclusion from all these measurements that the radiation of the sun in the U V appears to be stronger than the radiation of a black body from absolut. en tsp right. The radiation between the exterior appears to be a body temp. v o n e tw a a b sol. to speak accordingly. (R ep. Progr. Physics G reenw i, R o y a l O bservatory.) N i t k a W. C. Price, absorption spectra and absorption coefficients of atmospheric oases. The most impor tant information is provided via ab so rp tion sp ects of the following possible components of the atmosphere: N 2, 0 2, C 0 2 , H 20, H 20 2, 03, N 20, NO, N 0 2, H 2S, NH 3, CH4, C2H c and others sat. K W -sto ffe, S 0 2, CH20 and others. possible besta n d parts. When dealing with the question of the absorption coefficient. Vf. asserts that the q u a n tita tive c en n tn is and the interpretation of the absorption spectra still w ith large gaps. B it. are measurements of the A b so rp tio n sk o eff. in the S chum ann- U ltr a v io le tt (under 1900 Á). Vf. Makes some information about the exp erim en tell neccessary aids at S p ek tralm essu ngen in the different. Areas below 2000 Ä. The exact determination of the ab so rp tio n sku rve of the solar spectra in the area between 2000 Á and 100 Á met because of the numerous disc ons in this area there are great difficulties. (Rep. Progr. P h y sic s C am bridge, L abor, o f P h y sic a l C hem istry.) N itka G. B. B. M. Sutherland and G. S. Callendar, T he infrared spectra of atmospheric gases with the exception of water vapor. From the b e c an n th atm osphere. Gases (N 2, 0 2, HoO, C 0 2, 0 3 and the a to m ig en gases) have only H 20, C 0 2 and 0 3 absorption p ects in the ultra-red spec tralgeb iet. In addition, there are also absorption bonds in the essential s of S tick o x y d s. V ff. Are limited in their treatise to the fact that after only a u f C 0 2 u first a definition of the absorption coefficient is given. It is, of course, not a c o n st a n te, but, a b it depends on its n. Wavelength, and is still dependent on the t em p. and pressure. An increase in these conditions calls for a DOPPLER broadening of the individual spectral lines, a collision broadening and an increased number of spectral lines due to the excitation of higher energies. The possible molecular vibrations are explained for the two types of molecule mentioned, and the associated apportionment sk o effic en ts are estimated for the indi vidual p ectrums . In a further sectio n, the results so far are given on the apportionment c oeff. other gases with different ratios, whose presence is possible in the atmosphere: NHZ, CHit CM it CM a, C3H &, i NO, N 2Ot, CHJD and Ho / S. For the final clarification of all questions about the atmosphere. Equal radiation weight4 There is still a large number of tasks to be solved, which are briefly referred to in detail . (R ep. Progr. P hy sic s Cambridge, pem broke C oll., L ondon, Im p ​​erial Coll.) N itk a TG Cowling, D he absorption of water vapor in the far ultrared. In the present A The absorption of the IV.-D am p fes in the distant U ltraro t above 5 / ibe is already being observed, so in an area that is for the phy sics a l. M Eeteorology is of interest. T he position of the absorption bands is therefore less followed than much more the e.

3 1944. II. A i. A u f b u d e r M a t e r i e. 925 sam tabsorption in this long-wave radiation and its change with the temp., The pressure and the W.-D amp uk door of the W. molecule, its dipole moment and the resulting swing. After a short consideration of the total absorption of an ab sorption spec tru ms composed of individual lines and after the separate treatment of the pressure and temperature A factor ß is calculated for the pure flow for the individual spectral range e, which significantly determines the absorption. T he total tabsorp tion can be expressed in a simple form: A = / D'pw / p0, w ob ei A der Ab so rp tio n sk o eff., P / po das D The actual pressure for the atmospheric pressure and the interspersed W.-D amp fsh i t in cm w ater mean s .. The value is for individual spectral ranges between 5 and 152 /.i ta b ella r. specified. (R ep. Progr. P h y sic s M anchester, U n iv.) N i t k a R. W. B. Pearse, The spectrum of the night sky. V f. Gives an overview of the results of the U nts so far. of the spectrum of the night in the m els. Origin and assignment of both the a to m lines and the molecular bands are discussed. T he most important lines, which are shown with their spec tral symbols in a detailed table, come from the 0 2, N 2, N O; There are so far no indications for further sticks o x y d e or for the presence of atomic H or molecular H 2, but for the presence of CH, N H, OH and OH +. Furthermore, ribbons or lines of carbon stoffverb b seem to be. and of ionized 0 2 + -, CO + - and CCHyMoll. to exist. There are also a large number of unidentified lines. (R ep. Progr. Physics L ondon, Im perial Coll.) N it k a H. S. W. Massey and D. R. Bates, T he properties of neutral and ionized oxygen and its influence on the upper atmosphere. To sum up our current knowledge of the E igg. The neutral 0, the 0 + and the 0, mostly based on the theoretical. Findings. In a first section, the structure, the energy level and the line sp ek tren. Von 0, 0 + u. 0 "are discussed. Then the push processes w ith a neutral oxygen atom en (ph otoionization, ela st. scattering of long elec trons a. d esa c tiv ieru ng m eta stable oxygen atoms by impact), the recombination of elec trons with 0 + -A to m cn and the generation and decay of 0 _ ions. A final section is the application of the knowledge gained to the results is dedicated to the ionosphere, which means that there must be a estimated recomb in a tio n in the ionosphere A reciprocal neutralization process of excited atoms has to be mentioned as an essential possi bility, in connection with io nized layers with a possible correspondence me ta sta b ile atoms. (R ep. Progr. P hy sic s L ondon, U n iv e r sity Coll.) N i t k a C. H. Bamford, Photochemical processes in an oxygen-nitrogen atmosphere. The present summarized report sums up the following sections: P h otoch em. Processes of, 0 2, 0 3 and of S tick o x y d en, general considerations on ph otoch em ie in oxygen and oxygen nitrogen a tm osp h er. (R ep. Progr. P h y sics Cambridge, L abor, o f P h y sic a l C h em istry.) N i t k a Sydney Chapman, D he Photochemie des Atmospheric Oxygen. Combined overview of the latest work on the atm ospheric field. photo-chem. Rkk., Esp. The th e o r et. Investigations. T he p h o tolysis through absorption of the sun, the photochem. R k k., The p h otoch em. Equal weight, daily change in o zon concentration, the annual o zon concentration changes y * ng U. the dependency of the o zon. w ith the height. According to C h apm, R k M = 0, + is the main reason for the emergence of the eighth heavenly magic. to be held responsible if M any collision partner m ol. (As a rule Ö2.? er "*) means. M ore numbers of answers to the questions mentioned are sent. Ikep Progr. P hy sics L ondon, Im p ​​erial C ollege.) N itkap A. H unter, Sonnenphysik. V f. reports in summary on the latest results of solar research.In a first section, the assignments of timed wavelengths to the elements are given; In this case only to oemonisierto A tom e, for which the associated term designation and the ionization s r 'jptial is given. E in essential help with the id en tification of such specs (s rents The U ns. of the spark sp ects of the ele ments. A second section deals with the development of the chrom osphere, espe- cially also from a geophysical point of view the prominences and convection currents mentioned in the une. (R ep. P rogr. P hy sic s G reenw I, R oyal Obser- TaloU-) N itka

4 926 A x. A u f a u d e r M a t e r i e II. H arald L unelund, Strength of ultraviolet solar radiation in Finland. Using Cd and K photocells as compared with the D avo standard cell, the intensity of the solar radiation in the u ltr av io le tte n S p ek tra lg eb iet in the years. T he m easurements were in e tw a 60 geograp h. Width. Comparative measurements were carried out with the U V -D o sim eter. The results for different. The heights of the sun are graph. and tab ellar. replayed; they agree adequately with other observations. (Soc. Sei. Fen n., C om m ent. P h y sico m a th Febr H elsingfors.) N itk a Junior G auzit, The intensity of the forbidden lines and the condition of Boicen (absence of collisions). Vf. Discusses the conditions under which the forbidden lines can appear: the possi bility of complete avoidance of collisions (B ed in gu ngvon B owen), which is best fulfilled in G asnobeln, and that the int nity of the forbidden lines is not proportional to the pressure . T he probability that an atom will lose its energy through shock depends on the nature of the shock partner. In the case of a junction between the atom, the port of the potential energy is only possible between two very different q uant levels, however, a deactivation often occurs by colliding with elec trons, minor or the walls of the vessel. In the case of base gases and gases, which are found in the atomic state in the upper atmosphere, the collisions and the energy transfer can be very severe fig occurs without any inten sity affecting the lines sent out. In the case of the em ission of the forbidden lines of mol. Radiation, as in the case of the Ve- OARD-KAPLAN gangs of the N 2, the m ore number of throws, fa If they are between identical minor, then there is a complete r esonance of a complete transition of the excitation energy from one to the other. b e g leads, which ultimately leads to the emission of the banned radiations a m u n d et.This e m issio n is t a lso se lb s possible under an increased pressure. The collisions in the mists are nu- merous enough to significantly reduce the intensity of the radiation, as in an intensity measurement of the intensity of the lines of 0 II, 0 III and NII is proven, which receives a different value than the theory. demonstrate. The frequency of the collisions corresponds to a density of g / cm 3. In the case of excitation by collision, the m axim around the inte nity of the can be forbidden The line is not at an infinitely small pressure, as the more often the m eta stable state is reached the more often the minor. Collisions. Assuming that the probability of deactivation by pushing the medium pressure is proportional, it htm assumes that it gives an optimal pressure . The best condition for the submission of the forbidden lines is that there is such a concentration, the minor, that the clashes of the M oll, not too often, and yet a number of stimulated minor, or a to m s are part of further stimulation in the m t. (J. P liy siq u e R a d iu m [8] 5. Su pp l. April 14, 1944.) L i n k e A. G. G aydon, The band spectrum of nitrogen. New Singuleitsyslem e. (Cf. C I) In the area between A w ith a mild cond ened charge, new s y stem e of the N 2 are observed. The P -S y st. Corresponds to a transition p ^ g> a1i7 u u. W e overlapped by the very strong second positive bands. The origin of the 0,0 -Band d e lies at ca A (v =. 3 cm -1). T he three bands of a f ict are observed, which are categorized as (0,0), (0,1) and (0,2) bands. The head of the (0,0) band. w ill be solved in the r o ta tio n sfine struc ture -a u fg e. T he lines have the same atomic minor, charac terist. In sit tation change sel. The syst. a corresponds to the transition q JTg - ^ - aUTuu. lies between (0.0), 2878 (0.1) and A (0.2). Each volume consists of two tw o w ith no int e n sit e c h se l, u. the struc ture is in accordance with the assumption of a TT> l17 transition with an M coupling that has not been resolved. DasK- S y st. is in transition r0127g -> - al77 and the (0,0) -B an do lies at 2671 A. The P and ß branches show a strong inte nity In the case of higher J values, it is assumed that this is caused by a pred isso cia tion of the upper condition. The S system is a transition. s-ahu and the volumes of this s y st. are those of the R -S y st. very similar, but are weak after R o t a b a tted. T he (0,0) -band lies at ca U and shows changing inten tities. F or the S-y st. as with the T-oys. Are the P -L in ien b e th e stronger than the R -L in ien, which w oh l ought to be somewhat weaker than the P -L in ien. The T -S y st. en tsp dir t a em tu S g - ^ Z T u -Ü b er a n g. The intensity distribution of the indivi dual episodes, the strength of (0.0) -, (0.1) -, (0.3) bands, ak an e (0.2) -B andez proper, is unusual. The S y s t. lies at 2281 Ä (0,0) -bande.Eswc the V other Ziel u. K aplan system is also examined and determined that it is both p y systems are about transitions between 7-27 days. In the former case u L 327-> li32 7 and in the latter case around T erm e. V on K a p l a n s d rittem S y st. commencing at 2472, 2392, u Ä was never under the excitation conditions used

5 1944. II. A x. A u f b u d e r M a t e r i e. 927 observed. Of the four episodes given by the chapter 2428, 2360, 2297, 2236 Â- 2459, 2367, 2280, 2198 Â; 2272, 2204, 2139 Â; 2477, 2391, 2309 Â fall a part of the lines together w ith bands, which act as the fifth positi ve s y st. or are recognized as belonging to the new series. T he reproduced plates still show a large number of other struc tures which, as a result of the changing inte nities and because of the other purity of the p ek, contribute to the N 2 MUST be tidied up. The analysis of the five new systems reveals the energy of five new elec trons at the states of the N 2. The expectation that the four new states will merge into one The RYDBERG series were not fulfilled. It seems to be quite certain that the vl F state of the fifth positive band system is m eta stable. This could be when declaring the afterglow of the act. N 2 play a big role. The con sts for the s in g u lett states of the N 2 are given. The values ​​for the individual lines and the lines used for the evaluation are given in tables. (P roc. R o y. Soc. [L ondon], Ser. A / L ondon, Im p ​​erial Coll. Chem. E n g. D ep.) L in ke FJ Wagstaffe and HW Thompson, The infrared absorption spectrum, of trmethylpliosphine. Vff. Reports on measurements of the infrared absorption spectra of T iim etliylphosp in the range between 3 and 20, «. The absorption spectra were w ith different. The prints recorded. The measured oscillation numbers of the absorption bands were compared with the values ​​from RAMAN spectra, where available, and found to be in good agreement. T he best agreement is in the 710 cm-1 band, which is the antisym m etr. Vibration is attributable to the PC3 parameter. The higher frequencies probably correspond to deformation vibrations of the methyl groups. Further assignments can be described as unsure as long as no further U nts. are present on homologous molecules. (Trans. Farad ay Soc F ebr O xford, Labor, f. Ph ysik al. Chem ie.) N it ka H. Seemann, cone and linear projection of the crystal-imaging X-ray interference methods including the indirect generation of the primary beam bundles (Kossel effect ; Friedrich-Ram an-nilakantan-effect); new recording and surveying procedures. A system of the room lattice interfering process for crystal structure analysis according to generation geometry is used. P roducts in which the sta t.-p r o jek tiv en - Verff. (F estk ry sta llm eth o d en) are given the plac e that accords their great advantages. A look at the treatment in the textbooks, your advantages are assumed to be practically unknown. So he had to be the star. be made from the ground up and with a great deal of effort from diagrams, as they have not been known so far. The result is in a syste m a t. Table summarized. In particular, the lack of detail of the slice line projection is one of the first and the highest physically. Adequate recording and measurement security of the state. On the other hand, diagrams formed in cidences (L in ien intersection points) are treated. The applicability of the L anglin ien aufn ahm everf. (Wide angle diagrams) on K Lein stk ry sta lle! N M etal foils and sheets is shown on alum inium mounts. In an extension of an earlier treatise on the divergence of the reciprocal point grid and the reciprocal line grid, clusters of representations of the grid and a new one will be added Construction of double reflex layers added. (P h y sik. Z Sept Freiburg] B reisgau]). N i t k a Gustav E. R. Schulze, evaluation of X-ray goniometer images of higher slice lines on flat film with inclined incidence. It will be in graph. Required for the evaluation of higher lines w ith an inclined case, recorded SC H IEBOUD-SANTER diagrams described with the help of reciprocal grids. (Z. K rista llo g r., M ineral., Petrogr., Abt. A Febr D resden, T echn. H o ch schule, P hy sik a l. Inst.) G ottfried Gunnar Hägg and Gunvor Regnström, inlensility measurements with focusing cameras of the Seem ann-bohlin type. Description of the process. (A rk. K em., M i lwal. Geol., Ser. A 18. N r / U p sala, U n iv., C hem. In st.) G o t t r i e d Léon Guillet, The crystal wax without previous deformation. Grain growth occurs through long-term glowing at T em pp. Under the F. without the crystals being deformed beforehand. About V erss. a n Cd, M g, Zn and A l are reported. (Rev. Metallurg D ez) S c h a l Pierre Laurent, T he critical solidification of solid solutions. T he relationships are solidified by solid m eta ll. L sgg. stated how the strength increase is exponential (n = 2/3) on the concentration, on F rem d m eta ll a n g t. After the verse. von osbaud u. S c h m id is t this relation in the s y st. Zn-Cd strictly valid. (C. R. hebd. Ances Acad. Sei /) H e n t s c h e l

6 928 A 2. E l e c t r i c i t ity. M a g n e t is m u s. E l e c t r o c h e m i e II. Douglas Rennie Hudson, On density, thixotropy and explanations of heterogeneous silver malgames. Vf. Estimated the D. very pure silver amalgams in the range of heterogeneous solubility. Small but significant points in the D. composite curve were found at 15 and 28% A g. The diagram of the spec. Full, against the Z us. There are lines that cut at approx. 13 and 25% A g. In accordance with the work of other authors, an ag-g eh. Of 27.72% could be achieved by exiting Hg from Hgreich am algam en. This addition lies between A g3h g 4 and A g2h'g3 (28.74 or 26.4% A g), so that the previously discussed form A g5h g 8 (25.14% Ag) au ssch eid et. The am algams show flawless reversible th ixotropy: When standing, they sp on ta n solidify to a steady, relatively hard mass, the diment of which changes over a few days 1 1.5%, in three years even by 4%. By kneing or pressing the mass, it becomes liquid again. This process with its D. changes can be repeated as often as required. The solid state is interpreted by the author in such a way that the grid consists of a solid pass, in which the fl nw ild. The liquid under pressure is either the reversible R k. A g 3H g 4 ^ 3 A g H g + H g, or the grid has the same addition as the F l. (27.7% A g) a different package like this one, or there is a new one in tcrm etall. Verb. Before. (M etallurgia [M anchester] F ebr Edinburgh H eriot-w att-c oll.) G. Günther Cyril Wells, graphitization in very pure iron-carbon alloys. In the case of H first of Fe-C alloys from a F emit 0.0012 (%) C, 0.002 S i, '<0.0 4 Mn, 0.0033 Cu, 0.0054 N i, <0 , Cr, 0.002 Mo, 0.00013 S, <0,, 0.003 N and 0.0005H2 were used in one case. observed. D ila to m etr. Measurements have shown that this is achieved with rapid cooling (V s0 / m in.) Of alloys with a C value between 0.7 and 1%. G raphite that is once formed quickly grows in strength, but can be thrown by a std. Glow at 900 and turn off to be elapsed. (Bull. A ssoc. Tech n. F ond O k t./d ez P ittsb u r g h, P en n., Carnegie Technolog. In st.) P o h l H. Cornelius, Thermal expansion and transformation temperatures of ferrous materials. More detailed evaluation of Dila to m eter on steel specimens with 0.05 1.40 (%) C, 0.12 3, O Si, 0.13 3.6 6 Mn, 0 15Cr, 0.1.49 Mo, 0.27V, 0.23Ti, 0.96Th, 0.24Ni, and 0.122A1; also to a u ste n it. Tables with 0.1 0.5 C, 1 3.4 Si, 0.74 18 M n, 11.8 17.6 Cr, 0 2.1 W, 0 0.3 T i and 0 , 03 0.18 N 2; finitely on 3 gray cast iron with 3.46 3.97 C, 2.21 2.86 S i, 0.59 0.97 M n, 0.43 0.69 P, 0.032 to 0.043 S, 0 0, 55 Cr, 0 0.93 Mo, 0 0.09 V, 0 0.2 8 Ni and 0 1.56 Cu to determine the linear thermal expansion coefficients (up to 900), the changes in length in the Conversions Acj. - 3 and A r3_! u. when waxing cast iron, the transformation temp p p. and the T em pp. incipient increase in increase. The tem perature change speeds are 0.2, 0.5 and 1.5 / M in. The eval uation of the change in conversion length is not compared by comparing the sample length ied. T em pp. But the abbreviations for Ac! - 3 u. Z in a ra-! w ith a temp. that is related to the b e d ete w ith a ng. T he case of castings in the case of gray castings is particularly dis- cussed. Tables and diagrams. (L u ftfa h rt-f o rsch / B erlin-a dlershof, D eu tsch e V ersuchsanst. F. L u ftfa h rt.) D engel A ,. Electricity. Magnetism. Electrochemistry. Emile Brylinski, On the Rationalization of Magnetic Units. Rationalized units are the practical units that leave the elec trical units untouched and the magnet. d a ra u f without further reference, e. B. H in A m perew indungen per cent «-. meter. Discusses the consequences of using these rationalized units and the usability of rationalization, i. H. of the use of the practical units. (C. R. hebd. Söances A ead. Sei /) F a h l e n b h a c h H. Diesselhorst, Magnets in Permeable M edia and Definition of the Magnetic Moment. T he is still the still undeclared question of the de fi n itio n des magne. M om entes d isc u tied in perm eable media. At the moment it is still unclear whether as m agnet, m om ent a ls the retention of the rota m en tes for field strength or for inau tio n is to be defined. V f. Shows that a discussion of the force w rkgg. In perinealbie M edia no contribution to this question is made, since the magnetization factor V is insecure. So in the case of a long-term m a g n etstabes that the W rkg. in the m edium then the same as in a vacuum when i m a gnet. F eld strength th e same. In the limit a he m a g n et. In contrast, ind u c tio n never be the same. Whether it is for the ac uity case where B and H are equal to ind u c tion or f eld strength is the peculiar e ective factor for the m agnet. Momen. i>

7 1944. II. A 2. E l e c t r i c i t ity. M a g n e t is m u s. E l e c t r o c h e m i e. According to this, 929 is hard to swear to. The reasons for and rejection are dis- cussed and the conclusion drawn that this is m a gnet. At the moment it should be obtained from In d u c tio n B. (E lek tro tech n. Z / B raunschw eig, T echn. H o ch schule, P h y sik a l. In st.) F a h l e k b r a c h Henri Lacoste, properties and calculation of permanent magnets. R eport on the E ig. the most diverse types of d a u erm agnets and the computation m ants for the purposeful use of the various. TYPES OF MAGNETIC STEELS IN PRACTICE. (M esures March 1944.) F a h l e n b r a c h K. Hoselitz, T he geometry of magnetization curves and their consequences for permanent magnet materials. V f. Z eig t through geom etr. Consideration of the magnetization curve of magnet steels (ie the descending branch of the hysteresis curve between emancipation and co ecitive force) that the real (B-H ) M ax value, which for practical purposes is subject to exemption, lies between two limit curves, depending on H c / br. B ild et m to the geom etr. or arith m etr. Mean values ​​of the values ​​on these two limit curves, m an (B-H) M ax values ​​are obtained, between which the real (B-H) M ax generally lies. Vf., Depending on H c / b r, gives two sets of curves for these two mean values, from which m an in p rakt. In cases without measuring the demagnetization curve with sufficient accuracy, the real (BH) m ax value of the material can be determined. (L ondon, Edinburgh D u blin philos. M ag. J . Sei. [7.] Febr S h effield, U n iv., R es. L abor., P erm anent M agnet A ssociation.) F ahlenbrach Antoine Colombani, On the ferromagnetism of thin nickel layers. With an oscillograph described earlier. M eth. (C I. 2444) f errom agn etism u s thinner niches will be met. However, it is found that the non-annealed layers, irrespective of their thickness, only have a very small ferromagn etism. X-rays showed that these layers were two in the dimension of all atom groups. An annealing at 410 did not change this condition for layers thinner than 220 m / z. For layer thicknesses between 220 and 360 m / z k r y st. the strata h exagonal w ith only very weak ferromagnetism. E nly with thicknesses of more than 360 m / i a strong ferromagnetism arises, which can be attributed to the cubic crystal structure. The results are w ith the same. Results from S L a t e r and B l o c h related. (0. R. hebd. Soances Acad. Sei /) F a h l e n b r a c h Roger G. Bates, D he Thermodynamics of (2-l) -valent electrolytes. V II. The activity coefficients of lead bromide between 5 and 40. (V I. vg l. CII) The EK of the chains P b -H g (ll%) / P b B r 2 (m) / A gb ra g between 5 and 40 m intervals of 5 each with an already used m eth. Experim en tell e r m itte lt (cf. C II. 1125) as a f u n c tio n der K onz, m des P bb r2. Using the L a M e r- G ronwell- GreiFF extension of the DEBYE-Hückel theory for unsyrnm. Electrolyte receives V f. Exactly values ​​for the standard p otentials and the ac tiv ity c o e ff .; the ion diameter must be set at 1.55 Å a n g o. For the standard potential as a function of the T em p.w ill be found: E = 0.00113 (t 25) 0, (t 2 5) 2 w ith a middle errror of 0.08 m volt. (J. Am er. Formerly Soc / W a sh in g to n, D. C.) K. S c hä f e r G. Schwarzenbach and R. Sulzberger, On the alk a linity of strong solutions of: alihydroxides. While the ph -value is in the validity range of the law of limitation from Debye-Hückel to a maximum of a concentration, of about 0.0 1 n as id en t, with the negative logarithm H -Io n en a lctiv ity can be viewed, it loses in all the more concentrated solutions so-called. this con dition u ng becomes a purely conventional measure. [expand the p ^ - eg r iff u.sc tz en for the de fin itio n of the pn -value sa lsm a ß de ra cid itä t- ffljiittt for any number of items to be set de Id en titä t fe st: (P h) i- (ph) 2 0 n ^ J / lHS])! (ln [S] / [H S]) 2. H S-S is a Sä u re-b ase-pair in the sense of B rö N-oiedts (e.g. HC1-C1 '; N H, -N H 3). T he PH Difference of two cases. can be enjoyed with it at all times in such a way that m an in both cases. the N e u tr a lisa tio n sv e rh ä ltn is [S] / [H S] with uiifo some acid-base pair (e.g. Indicator) b estim m t. Each such '«re.base pair has its own pn difference between 2 cases. 1 and 2 on; However, any given value is not only derived from the H S S pair, but also from 1 other pair of the same type of load and similar former E ig g. shown. Any F l for the 8t of the Pn value. w ith th e n eu tralisa tio n sv is obtained w ith th e bru erm and w ith that one w ith that one w ith a sufficient amount. L sg. known P Vcrtes ^ compared. T h o s h o ns best o p t. W eges, however, w ith a single in dicator, the highest ph differences of tw o two units can be determined. If larger differences are to be eaten, then h a m e tt w ith h e

8th ! 930 A3. T h e r m o d y n a m ik. T h e r m o c h e m ie II. The two two E il. A ream of transitional solutions. V ff. apply this m eth. o u f die sta k e n sgg. v o n N a OH and K O H an. The indices used belong to the charge sty p n = 1 a n (H S S '). Because of the very large salt abilities of the strong A lk a lih yd roxyd lsgg. w ith the dyes w ith an em o rgan., w ith the u se unmixable solution. solved, then vigorously protected w ith the leach to be eaten and finally the color change brought about by the food. A ls indica to ren served some G lu taeon diald eh ydd erivv. and in d ig o colored fabrics. Serve as an inert solution: pyridine (with high alk alik on zz.), C hinolin, D im eth y la nilin, amyl alcohol (with low alcalicon zz.), Nitrobenzene , X y lo l and various Common of the same. By releasing the different. Dyes in the different. Solution m. Or their mixtures, the indica to r systems suitable for Nao H and K O H are created. T he color change of the indicators w ith B est. des e x tin c tio n sk o eff. to eat gem. If you apply to the logarithms of the neutralization ratio as a func tio n of the A lk alik on z, you get m flocks of curves, which are partly steep, partly flat. These belong to two diffe- rent ways. Envelope m ech of the indicators a n: stiff c u rv e n t sp uit s of the loss a es pro to n s, flat curves of the ad d itio n an es O H -ions. Only the former provide information about the course of the p ^ -value. From these curves and assuming that the pn values ​​for N ao H and KOH are 14, V ff Alkali concentration. It turns out that at L sgg. the same n o rm a litä t K O H is much stronger than N ao H. P ress t m to the K onzz. the A lk a lih yd ro xyde in p rozen ten, then Nao H is somewhat alkaline as KO H. The most concentrated, at 20 even more fl. N ao H has a P hvone tw a 19. (H elv. Chim. A c ta / Z ürich, Chem. Inst. D. U n iv.) M. Schenk CG Fink and CC Ma, D he direct extraction of tungsten. Electrolysis in molten salt. After the V erss. the V ff. - can be w o n w o n h w o em R degree of unity imme diate a r also from com p lexes W -E rzen elec troch em. Benefit if suitable pool rooms are used as baths. Is a melt of 7 mol. N & iPoO used? and 3 mol. N ap o s u. Lo ves 1 part w olfram itc on zen occurred in 1.75 parts of the phosphate melt, so it stops at 1000 and a current of 50 amps / qdm the metal in a current yield of 66.55%. Also in the burax bath, which contains 1.5 parts of burax in 1 part of ores, gives good results, while baths with molten alcalicarbonates are different. Foundations are suitable. (C hem. Trado J. formerly E ngr /) H e n t s c h e l Fritz Pavelka, investigations into the aluminum top layer. 2. About the luminous phenomenon that occurs during the anodic oxidation of desa lum inium s. (Cf. C I. 166.) T he measurements w ill be a bit more for the anod. O x y d a tio n d es A l characteristic. Sizes such as N N y-g ch. and conductivity and p n -value of the b o r a tsg., as well as oxydation voltage and ligh ting d i ts, are given. In an em H 3B 0 3-N H 3 -Elek tro ly th the m a x im a le L eu ch t i te up to 8/5000 Ä q u iv. N H 3/1 e in M ​​inim um. The time to reach the maxi mum light density and the time to reach the maxi mum formation voltage show a m axim at the same concentration, while the free pores area at the same concentration, e in m inim um aufw eist. The following factors may be responsible for the sequence of the phenomena described: 1. Surface conduction phenomena as shown in Fig. G. u. a d so rp tio n different, a ared ions in the p ores. 2. pji value of the L sg. by the in u uence of th e build up of the porous scaffolding. 3. THE EFFICIENCY OF THE L sg. by influencing th e loading sm ech a n ism u s in the p ores. (Kolloid-Z. W M ärz B o logna, F orsch u n g sa b tlg. Der D u ca ti.) H e n t s c h e l A 3. Thermodynamics. Thermochem ie. Félix Michaud, The secret of empty space. It is possible that an extremely dilute gas has an entropy value that is even a few powers of ten greater than a completely diffuse radiation at the same temperature. and in the same volume. (Rev. sei /) H e n t s c h e l W alter Hoffmann and Fritz Florin, Appropriate representation of D am pfdm - curves. The commonly used representation of the vapor pressure curve h is compared with one another in terms of their suitability. T he form of representation is very practical, according to which the dampening pressure curves of all substances are straightforward enough for accuracy. In order to facilitate the application of this data, in which the logarith m us of the pressure over a special empire. Divided t emp.-axis is given, this division is established by a form. In addition, the range of the deep n tem pp. W ith comprehensive development is w ill, in which the logarith m ust the pressure over a material axis

9 1944. II. A 4. G b e n z s o h i c h t f o e s c h o t t g. K o l l o i d o h e h i e is worn. In this d arst. w eld the different. Tem pp. Set by pole jets. The pressure curves of the K W substances run practically in a straight line and parallel. (Z. Vor. D tsch. In g., B eih. V experstechnechn B erlin-t egel.) A. Teofimow, The vapor pressure equations of some gases and their vapor pressures from 100 to 10. The vapor pressures P are numerous er S ub punch or prep. inorganic and organ. A rt are compiled in large t em p. Areas in 5 tables. The constants A and B of the formula P = A / T -j-b are used for interp o la tio n. for a few small subranges the temp. is calculated and put in an additional table (accuracy 1 2%). Some application examples (e.g. calculating the evaporation heat from a u s) are shown. (Z. kom pr. Flü s. Gase Febr) Z e i s e, Physico-chemical constants of compressible gases. In tabular form. Form w ill be the most important p h ysics a l.-ch em. D a te s such as mol. G ew., K p., Heating values, spec. Warmth at 0 etc. for numerous inorganic. and organ. G ases set together. T he information is based on the tables in L andolt - BÖenstein and on more recent literature up to (Z. kom pr. Flü ss. G ase F ebr) Z eise Harold Sim m ons Booth and Donald Ray Martin, Thermal Analysis of Immediate Gases. When submitting the T em p. an es fl. 2-com p o n en ten syst. Compared to the time during the slow cooling below the E., there is also a continuous cooling curve as long as there is a single flow of blood, whereas there is a discontinuous curve, w hen a 2nd pass appears; w hen this same Z us. has like the fl. P h a se, then the T em p remains. c o n sta n t until the liquid phase disappears. By submitting th e T em p p. Where the disco n tin u itity is based on the cooling curves for different. Conc. of the two components begins against the consortium. (in molar fractions or mol-%) results in e in phase diagram m, whose m inim a the e u te k t. Points and their m axim a the picture g. of the most popular verbs present. V ff. Give a critical overview of the experimental prerequisites (H first., Cleaning, storage of the gases, determination of their molar breakages as well as the E E. and F eh ler) and above all about the 2-com p onent sysstems that have been investigated up to now. Numerous diagrams show these results. (C hem. R eview s O kt C leveland, O hio, W estern Reserve U n iv., M orley, Chem. L abor.) Z e i s e A4. Boundary layer research. Colloid chemistry. Karl A. G. Meyer, Work on powder dispersoids Comprehensive overview. (K olloid-z March 1944.) H e n t s c h e l Karl A. G. Meyer, About the spatial filling of powder dispersoids in the limited barely. 1. Theoretically. Calculations under the simpli fied conditions are shown in the limited space a dependency of the in-between room vol. of the size of the balls taken. W ith a decreasing spherical radius, the space ful ll ng or the interspace decreases. A limit value dependent on the p ack u ng is to be assigned. (Kolloid-Z M ärz H u su m.) H e n t s c h e l Karl A. G. Meyer, On the space filling of powder dispersoids in a limited space. 2. (1. see above. Ref.) T he th eoret. Calculations are made by 'erss. The spherical radii are checked via the space filling of spherical packings in the limited (cube-shaped and cylindrical) space when small. (K olloid-z März H u su m.) H decel P. Mondain-Monval and J. Quiquerez, Liquid mixtures separated in 2 layers and critical turbidity. On the basis of the observation of the cloudiness point at numerous tern. (u. bin.) heterogeneous s y stem s can apply the following rule; le critical opacity is closely related to the calculation coefficient. of the compo nents and is of their chem. N a tu re inde pendent. In all mixtures in which the maximum deviations between the calculation coefficients. the constituent parts are small (less than 4 units of the 2nd decimal), there is no critical clouding. It can also be omitted in the case of even greater differences, if the distribution coefficient. so lies that snot of the distance from the criterion. P u n k t the billing k oeff. of the two layers (sol.) ^ lie one on top of the other. (B u ll. Soc. Chim. France, M6m. [5.] Jan./F ebr. J * 4.) H decel Harry B. Weiser and WO Milligan, The Mechanism of Mutual Coagu- ~ With H help of poten tiom etr. The changes in w add. The electr. D op p lily on the particles of hydrophobic brine, », e * m system a t. M ure two brine with opposite charge appear in proportion; serve as positive brine 2 F e, 0 3 brine

10 932 A 4. G r e n z s o h t f o e s c h t t n g. K o l l o i d c h b m i e II. Degree of purity according to G r a h m and an Fe 2 O 3 sol according to S o r u m; as negative brine 4 different. Copperfcrrocyanide sol, as well as an arsenic trisulphide, a tin dioxide and a Congo red sol. The mutual adsorption of oppositely charged particles leads to a lowering of the t-potential of the mixed particles. In general, with this mutual adsorption, a shift of the counterions occurs. In most cases the [H] + are the most important stabilizing ions for the positive and the counterions for the negative brine. As a result of the strong adsorption of [H] + by Fe (OH) 3, the [H] + activity of the mixtures fell to a minimum value in these combinations, while at the same time the activity of the Cl_ ions reached a maximum value. In the mixtures of Fe20 3 with Sn02, the [H] + activity showed a clear reduction, while the Cl_-ion activity showed only a slight increase due to the adsorption of the Cl_ ions by Sn02. In the Fe20 3 sols according to S orum and Congo red, the adsorption of the ionic microcllo of the coll. Electrolyte is strong enough to displace [H] + and Cl_ ions, the curves for the ajj + and aci- in Depending on the addition, have a maximum. Since the [H] + counterions in the negative sols are stabilizing ions of the Fe20 3 sol, the area of ​​complete mutual coagulation can be in front of, in or behind the minimum (or maximum) in the aj] + composition curves of the different. Mixtures come to rest. (J. physic. Chem June Houston, Texas, Rice Inst.) H e n t s c h e l Lucien Plantefol, On Osmosis. Conceptualization & New Theory. (CR hebd. Séances Acad. Sei / K eil Lucien Plantefol, Phosphate und die Osmose. Comparative verses on osmosis and imbibition were filled with discs made from Laminaria flexicaulis stems. A solution of a certain molarity was applied to the test objects ( 0.01 to 3.0 mol) the following connections: ILPO ,, KIDPO, KJ 1 PO and K spo ,. The osmotic phenomena were recorded: 1. by measuring the maximum thickness of the disc, even, 2 by measuring the mean speed of absorption of W. during 24 hours (mm increase per hour); the weight test after 24 hours gave a measure to determine the size of the imbibition: osmosis - imbibition (%); nn ~, lilmose fw .-fleli. bollooteilcn H 3POj. KH, PO, K2H P 04 k; po 4. - ^ a vg JlTOi, "A Mf n av xi im11 un" m CS Gea e ebiirind schw in dirrl-eif ig ke it XrOCkdl ^ GlV * -KOIltrOllC (mm); (mm / S t d.); 44 1,,,, 8 with (le s t. W. = ',', 1000 = = = = The on a swellable and permeable membrane taking place Osmosis of a solute is not the osmot. Pressure of the osmot. Fl. proportional; it is staik dependent on the change in membrane swellability brought about by the medium. (CR ed. Séances Aead. Sei /) K e il N. Riehl, Some observations on the diffusion of gases through rubber foils - Sharp (via P20 5) dried rubber membranes show an extremely high permeability for all gases, which immediately decreases by a few zolin powers As soon as (e rubber has absorbed traces of moisture. When it cools down to 57, the gas permeability does not decrease, but rather an increase in permeability takes place many times over. Various observations are communicated and discussed, which speak in favor of that the gas permeability of the extremely dried rubber is never based on the real solubility of the gases, but on a diffusion through channels with superatomic dimensions (whereby adsorption of the gas can take place on their walls 1- When moisture is absorbed, the material swells and the channels close si (Kolloid-Z March Berlin, Auergesellschaft AG) H bntschl Robert Simha, anomalies of elasticity and flow and their beings those for inorganic. Glasses and high polymers characteristic. Eigg- the y laxation, the elast. A comparison of the aftereffect and creep. The presence of such substances is characterized by the presence of an entire series or a relaxation spectrum. Similar conclusions can be drawn from the dispersion of polar polymers. In a rough approximation, the relaxation spectrum of a high polymer is determined by the following three molecular mechanisms.

11 1944. II. B. A n o r g a n i s c h e C h e m i e. 933 Rk. Of the chain sections against the applied tension, the change in the shape of the chain as a whole and the mutual influence of the chains on one another. It is shown how the memory function according to B o l t z m a n n and the relaxation spectrum can be derived from the creep values. (J. physic. Chem April Washington, Howard Univ.) H e n t s c h e l Eugene C. Bingham and Robert T. Foley, The Fluidity of Electrolytes. II. (I. cf. C) The extensive numerical material, as it is based on the viscosity measurements on wss. Elcktrolytlsgg. by R u b y and K a w a i on the one hand and B r u c k n e r on the other hand, has been evaluated by these authors on the assumption that the viscosities behave additively. The differences between the observed u.The calculated values ​​are calculated on the assumption that it is not the viscosities but the eluidities that are generally additive, which reduces the differences by 50%. Although in many cases this amount equals that of the experimental error, in other cases it exceeds it considerably. The larger differences that still exist are due to an influence that has not been taken into account so far, namely the Verd. any solute during blending should be attributed, & an author is given for correction. In the first communication, a positive value for the ionic increase in the fluidity of Pb was given, with reservations, as it results from the reliable information from G rü n e i s e n for Pb (N 03) 2. A new determination of PbCl2 now leads to the expected negative value. When converting for Pb (N 03) 2, the values ​​of G rü n e is e n provide a result that agrees well and leads to an ion increase of 28.2. Furthermore, fluidity values ​​for mixtures of n solution of NaCl and KCl at 25 and n solution of RaN03 and KN 03 at 10, 20 and 30 and of 0.05-n solution of LiF and KJ at 25 were reported . (J. physic. Chem Oct. Easton, Penns., Lafayette Coll.) H e n t s c h e l Carl Benedieks and Per Sederholm, Adsorption as the cause of the, floating droplet and a foam consisting only of liquid. The phenomenon that can be observed when drops of liquid fall on a stationary liquid surface, that the drop floats on the liquid surface for some time before disappearing, is due to the adsorption of foreign substances on the liquid surface. The adsorption of gases such as air and C02 can also lead to the formation of floating droplets that do not appear during evacuation. Especially large and long-lasting drops are with saponinlsgg. or on a W. surface coated with an oil film. A 0.5% saponin solution. With petroleum, gives a remarkable foam consisting only of filling and almost the same appearance as the known liquid-gas foam obtained by blowing air into the solution. (Nature [London] / Stockholm, Labor. C. Benedieks.) H e n t s h e l B. Inorganic Chemistry. I. D Ans, Investigation of Metastable Solubilities in Systems of Salts of Oceanic Salt Deposits. (Conclusion to C II. 402,) The author for the graph. Derivation, drawings of sections and methods of the graph. Persecutions of cry- bulization described. As an example of the theoret. The basis was the reciprocal salt pair K2Cl2 -) - MgS04 ^ ±: K2S04-f-MgCl2 and the quinary system, the above system. saturated with NaCl. Solubility determinations were made in the KCl-Fcld of the luatemary system and the quinary system at 25 and 35. (Kali, related salts mineral oil May 1944.) SCHÜTZA A. Guyer and T. Piechowicz, solution equilibrium in aqueous systems. 4. Mitt. The system. GO ^ -NH ^ -HX) at (3rd cf. C) The equilibria between the two branches of the 1 at-isobaric (boiling curve) in the tomp. Range U 50 are determined anew. Vff. Describes the left branch of the isobar as the C02 saturation curve, the right branch as the NH3 saturation curve. The investigation is carried out in such a way that after Weiner changes the test conditions (NH3 conc. Or temp.) A clear change in the mkr. Image is explored. If this is the case, it can be said with certainty that in the relevant conc. Or tomp. Area a limit of two saturation fields w ith different. Soil bodies present. Experimental results: Two different exiles. Double salts. However, their consistency was not determined. Perhaps they are identical to the already known double salts (NH4) 2C03-2 NH4HC03-H20. ammonium carbonate hydrogen carbonate) (I) and NH4HC03 NH4C02NH2 (ammonium yarogen carbonate earbaminate) (II). The equilibria are determined from 5 to 5

12 934 B. Inorganic Chemistry II. The field of the verb. I disappears at 34, that of the verb. (NH.i) 2C03, H 20 at 31, the field of the verb. II appears at 29. The saturation fields of I and II have a short common borderline between 29 and 34. The two double salts are mkr. easily distinguish za. I kryst. in large hexagonal leaflets, II in small, imperfectly formed crystals. The areas containing these crystals appear milky white. Characteristic. is that they have a noticeably slower resolution rate than others in this system. occurring salts. In this respect I behaves similarly to kieserite or langbeinite. Another salt of unknown addition (III), which probably does not have a stable saturation field, crystallizes in short, very thin needles mostly primarily in the representation of I and changes into this after a few hours. (NHj) 2C03-H20 can convert directly into III. (Helv. Chim. Acta until /6./1944. Zurich, Eidgen. Techn. Hochsch., Techn.-former. Labor.) E r n a H o ffm a n n Ralph P. Seward, The solubility of sodium carbonate in molten sodium hydroxide. Freezing point measurements of the NaOH-Na2CO3 system up to 35% Na2CO3 were carried out. The F. of pure NaOH 'was found at 320 and the transition point at 294. The addition of Na2C03 reduces the F. until a eutectic at 286 with a Na2C03-Geh. of 22 is reached. The calculated heat of fusion of NaOH is 1670 cal. (J. Amer. Formerly Soc / State Coll. Pensylvania.) Schütza Herbert H. Anderson, cyanates and thiocyanates of phosphorus, arsenic and antimony, phosphoryl isocyanate (I) PO (NCO) 3: 300 g Ag isocyanate and 200 g POCl3 in 225 ml Bzl. Boil for 44 hours with occasional shaking, filter off AgCl and phosphoryl cyanate (II) [PO (OCN) 3], Bzl. remove; 12.5 g (11%) I, colorless FL, the low yield is due to the large proportion of the blocks. II. Bk. With Pb-cyanate proceeds extremely slowly under the specified conditions. I has F. 5.0 ± 0.5; Kp, 1 ± 2 »; logj0 p (mm) = 9, / T; ) .v = 13.41 kcal; h- / D = 28.8 approx! Degree; D. 1.570 ± 0.003; n20 = 1.4804. Tear irritation. less than with POCl3- - II from I by 5 hrs. Heating to 156 and removing the excess I in a high vacuum; light yellow powder with no recognizable crystalline structure. Gas development occurs with acids. a. At 20 hrs. Heating from I to 100 is 2% in an insoluble. Form transferred, which turns dark when heated in a high vacuum and is not volatile. Phosphoryl thiocyanate (III), PO (SCN) 3: 110 g AgSCN and 80 g POC13 in 130 ml. Heat for 40 hours in a steam bath while shaking. Fractionated dist. 20 g HL of colorless bottle, which turns orange on standing for a long time; can be supercooled to below 0; F. 13.8 ± 1; Kid. 300.1 ± 2; log10 p = 8, / T (slight decomposition and darkening in the vapor pressure measurements, especially above 250); A »= 14.82 kcal; Ar / T = 25.8 cal / degree; D. 1.484; no tear irritation. III gives with acidified Fe (N03) 3 solution. strong thiocyanates .; with H N 03, especially hot and conc., NH4HS0j and HCN are formed. Arsenicocyanate (IV), As (NCO) 3: 45 g Ag isocyanate and 17 g AsC13 in 100 ml Bzl. Heat on the steam bath for 30 minutes; after filtering and evaporation of the solution remains a colorless firm st, which in Bzl. has limited solubility. At a dist. Below 1 at, only a little bottle goes. above; at 150 mm dist. 60%, at 73 mm and 150.7 about 80%; }