摘要:

13C NMR spectra of a series of compounds obtained by alkylating 3,4-methylendioxyphenol with 1-bromo-3-methylbut-2-ene have been taken and the spectral peaks have been assigned.

ISSN:0038-7010    

DOI:10.1080/00387018208068021

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

The far-infrared and Raman spectra of the tribromomercurate (II) anion as salt of tetrapropylammonium have been obtained and interpreted in terms of a halogen-bridged structure. The total coincidence of the ir and Raman bands rules out a D2hor C symmetries for the anionic species but a C2vor C1symmetries are likely to occur.

ISSN:0038-7010    

DOI:10.1080/00387018208068022

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

A PMR analytical procedure is described for the quantitation of camphor and parachlorophenol in camphorated parachlorophenol. The method is simple, rapid and accurate with standard deviations of ±1.13, ± 1.01 for camphor and ± 0.62, ± 0.89 for parachlorophenol, in standard mixtures and in camphorated parachlorophenol, respectively. The PMR spectrum, in addition, provides a very specific means for identification of camphor and parachlorophenol.

ISSN:0038-7010    

DOI:10.1080/00387018208068023

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Since what appears to be the first infrared (IR) observation of a char by Kmetko in 1951,1IR spectra of coals, chars and various carbon materials have been invariably shown to have a more or less intense band near 1600 cm−1. A variety of suggestions has been made concerning the cause of the band but the assignments have been in dispute and remained controversial for thirty years.

ISSN:0038-7010    

DOI:10.1080/00387018208068024

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

This is a compilation (up to the end of December 1981) of the lifetime of electronic states in diatomic species experimentally determined mainly by the phase-shift and exponential decay techniques. The meaning of “limits of error” in such measurements is discussed.

ISSN:0038-7010    

DOI:10.1080/00387018208068025

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Raman scattering intensities of the NO2symmetric stretching vibration band were measured for some aromatic nitrocompounds. It was shown that in the case of ortho alkyl-substituted nitrobenzenes, the intensities decrease in an orderly fashion with the increase of the degrees of twisting of NO2group from the plane of benzene ring. From this result, it was assumed that the factor determining the intensities in question is the conjugation effect between NO2group and benzene ring. Then, the intensities for some para substituted nitrobenzenes were examined, and the influence of substituents was discussed in terms of the conjugation effect. It was shown that when the electron donating character of substituents becomes stronger, the intensities intensity change among the compounds. The more experimental data and the detailed theoretical analysis of them are necessary not only for the elucidation of spectroscopic aspects of the intensity in question, but also for establishing the criterion for the application of it to the group type analysis and the microanalysis. Therefore, further experimental and theoretical examinations are required and now proceeding in our laboratory.

ISSN:0038-7010    

DOI:10.1080/00387018208068026

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0038-7010    

DOI:10.1080/00387018208068020

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor