Raman Scattering Intensities of the NO2Symmetric Stretching Vibration Band of Some Aromatic Nitrocompounds
作者:
Zegen Zheng,
Seiichiro Higuchi,
Shigeyuki Tanaka,
期刊:
Spectroscopy Letters
(Taylor Available online 1982)
卷期:
Volume 15,
issue 9
页码: 773-787
ISSN:0038-7010
年代: 1982
DOI:10.1080/00387018208068026
出版商: Taylor & Francis Group
关键词: Raman scattering intensity;Resonance Raman effect;Substituent effect;Aromatic nitrocompound
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.
点击下载:
PDF (500KB)
返 回