摘要:

AbstractThough the spectra in polyphenyls are often broad and structureless, the general pattern of these spectra is very similar to those in polyacene series. The systematic behavior of theα, p, and β bands inp‐polyphenyls can be explained in terms of simple MO theory with the first order configuration interaction. The behavior of the p and β bands can also be approximately calculated by straightforward exciton theory. The usefulness of the exciton theory is best demonstrated in the case ofm‐polyp

ISSN:0009-4536    

DOI:10.1002/jccs.196800014

出版商:WILEY‐VCH Verlag    

年代:1968

数据来源: WILEY

摘要:

AbstractA rapid determination of the diffusion coefficients of some gas‐vapor binary systems was studied with a method similar to the operation of gas chromatograpic techniques. The diffusion coefficients of some hydrocarbons and alcohols in hydrogen atmosphere were determined. Then, detailed comparisons of these data with the available experimental values obtained by other methods and with the theoretical values calculated from the equations of Gilliland, Arnold, Hirschfeder, Slattery, Othmer, and Giddings respectively were discussed. The diffusion coefficients at various temperatures and flow rates of the carier gas were studied and their correlations to the different types of tubes were also discussed. The temperature power dependences of their diffusion coefficients were found experimentally for several gas‐vapor binary syst

ISSN:0009-4536    

DOI:10.1002/jccs.196800015

出版商:WILEY‐VCH Verlag    

年代:1968

数据来源: WILEY

摘要:

AbstractReaction of phenothiazine with methyl iodide in the presence of mercuric iodide did not yield a product with a methyl group attached to the sulfur atom. Instead, a quaternary ammonium salt was obtained. This paper is intended to provide correct information with supporting evidence for this raction.

ISSN:0009-4536    

DOI:10.1002/jccs.196800016

出版商:WILEY‐VCH Verlag    

年代:1968

数据来源: WILEY

摘要:

AbstractThe absorption maxima of the fluorescence spectra of the berberine series alkaloids are broadly distributed between 360 and 560mμ.The fluorescence spectra of most substances of this series are very monotonous one having a single peak, the spectra of tetrahydrocoptisine and tetrahydroepiberberine are quite exceptional and consist of two wavy bands.The introduction of the auxochrome group into the molecule of “proto” compounds causes the decreasing of the fluorescence intensity and this effect is strongest in case of transition from protoberberine to berberine.That, tetrahydropalmatine does not show the distinct fluorescence spectrum band is the only incomprehensible

ISSN:0009-4536    

DOI:10.1002/jccs.196800017

出版商:WILEY‐VCH Verlag    

年代:1968

数据来源: WILEY

摘要:

AbstractN‐(6‐methoxy‐3‐pyridyl)‐sydnone (I), N‐(4‐nitrobenzyl)sydnone (II‐1), and N‐(2‐nitrobenzyl)sydnone (II‐2) have been prepared. Condensation of 2, 4‐dinitrochlorohenzene with N‐(carbethoxymethyl)sydnone (II‐4) produced N‐[(2, 4‐dinitrophenyl) carbethoxymethyl]‐sydnone (II‐5). Under normal condi

ISSN:0009-4536    

DOI:10.1002/jccs.196800018

出版商:WILEY‐VCH Verlag    

年代:1968

数据来源: WILEY