摘要:

AbstractThe heats of adsorption of hydrogen on several Ni‐SiO2catalysts were determined from the dependence of the amounts adsorbed on the pressure and the temperature. Three systems were investigated: a sample obtained by reduction of an imperfectly crystallized Ni‐montmorillonite, a coprecipitate and an impregnation catalyst. The three systems were only found to differ in the total amounts of hydrogen adsorbed. The following equation was found to apply for temperatures between 195° K and 673° K and pressures from 0.1 to 100 mm Hg.\documentclass{article}\pagestyle{empty}\begin{document}$${\rm RT}\ln {\rm p}({\rm atm}) + {\rm T}\left\{ {\frac{{\mu _{\,{\rm T}}^ \circ - {\rm h}_{\, \circ }^ \circ }} {{\rm T}}} \right\} - 2{\rm RT}\ln \frac{{\Theta _{\rm H} }} {{1 - \Theta _{\rm H} }} = - 24.000 + 14.400\Theta _{\rm H} {\rm cal}\,{\rm mole}^{ - 1}$$\end{document}In this equation μ°T‐°°/T is the “free energy function” of gaseous hydrogen and ΘHis the fractional coverage assuming total coverage at 195° K and 1 atm.Heats of adsorption deduced from this equation were found to be 5 kcal/mole−1lower than those reported for Ni‐films, but higher than others reported for nickel obtained by reduction. The possible causes of these diff

ISSN:0165-0513    

DOI:10.1002/recl.19530721102

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19530721103

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractStarting from the theory ofOnsager‐Böttchera new formula is derived by which the influence of the refractive index on the molar extinction coefficient of a solution can be calculated.As this formula is rather complicated, approximation formulae are given for certain types of solutions. These formulae prove to be in better agreement with experiments than the formula ofChako‐Ko

ISSN:0165-0513    

DOI:10.1002/recl.19530721104

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19530721105

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractThe Raman frequencies of liquid selenophene are communicated here. The infrared absorption bands of liquid selenophene have been determined in the region 1600‐670 cm−1mainly, using a Perkin Elmer instrument with a rock salt prism and by Dr.Lecomtein Paris for the lower frequency region (about 390‐600 cm−1), making use of a grating spectrometer. Quantitative depolarization ratios were determined for the not too weak Raman lines.Selenophene has a non‐planar configuration with only one symmetry plane remaining (symmetry C15). A striking analogy exists between many features of the vibrational spectra of selenophene and

ISSN:0165-0513    

DOI:10.1002/recl.19530721106

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractThe fusing point diagram of NOCl with AlCl3has been investigated.The curves show a well defined maximum at a composition of1mole of NOCl and 1 mole of AlCl3. The congruent melting point of the compound NOCl · AlCl3has been determined as 180° C. In high vacuum this compound can be sublimed almost undecomposed.Another compound with an incongruent melting point has been found. containing 2 moles of NOCl and 1 mole of AlCl3(transformation point 17.5° C).Moreover there exists a two liquid layer region extending from about 84 mole % of AlCl3to about 99 mole % of AlCl3. (The temperature of the three‐phase equilibrium S AlCl 3+ L1+ L2is about 195.2° C).Some attention is paid to the difficulties encountered in the determination of the exact melting point temperature of solid AlCl3and to their ex

ISSN:0165-0513    

DOI:10.1002/recl.19530721107

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractThe binary freezing‐point diagrams of SeCl4AlCl3and TeCl4AlCl3were determined. Both systems show a dissociating compound in a molecular ratio 1: 1 with melting points of 163.8° C resp. 149.3° C.In the case of the binary system SeCl4AlCl3only one half of the system, with AlCl3in excess, could be determined because of the decomposition of SeCl4at higher temperatures. The compound TeCl4· AlCl3could be distilled in high‐vacuum without decomposition.An approximate value for the heat of fusion of both addition compounds wa

ISSN:0165-0513    

DOI:10.1002/recl.19530721108

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractBy application of the method, described in the previous papers of this series2), to trans‐4‐styryl‐m‐dioxane, a mixture of 5‐phenyl‐penten‐4‐ol‐1 and 5‐phenyl‐pentanol is obtained in good yield. 4‐Phenylethyl‐m‐dioxane does not reac

ISSN:0165-0513    

DOI:10.1002/recl.19530721109

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractA synthesis of 2,2′‐azoisobutane is described. This new compound gives tertiary butyl radicals and nitrogen upon thermal decomposit

ISSN:0165-0513    

DOI:10.1002/recl.19530721110

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractIn a previous publication1) the synthesis was described of 3′,3″‐disulphanilylamino‐phenolphthalein as a potential chemotherapeutic for combating infected bile ducts.Below the synthesis is described of mono‐sulphanilylamido‐phenolphthalein, α‐phenyl‐β‐(3‐sulphanilylamido‐4‐hydroxyphenyl)‐propionic acid, and 2‐carboxy‐3′‐sulphanilylamido‐4′‐hydroxybenzophenone. An investigation for informative purposes of the latter two compounds has been made as regards their bacte

ISSN:0165-0513    

DOI:10.1002/recl.19530721111

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY