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Vibrational spectroscopic study of rotational isomerism in O , O ‐dimethylphosphorodithioic acid
Author(s) -
Jing XuYing,
Ouyang TianMei,
Chen WenJu,
Zhang GuiLan
Publication year - 1989
Publication title -
acta chimica sinica english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 0256-7660
DOI - 10.1002/cjoc.19890070306
Subject(s) - chemistry , intermolecular force , raman spectroscopy , hydrogen bond , infrared spectroscopy , infrared , spectral line , rotation (mathematics) , crystallography , molecule , organic chemistry , physics , geometry , mathematics , astronomy , optics
In this paper, the IR and Raman spectra of (CH 3 O) 2 P(S)SH have been studied at room temperature and at lower temperature. It is found that the P = S stretching vibrational band consists of four sub‐bands, which shows that there are four rotational isomers for (CH 3 O) 2 P(S)SH. With the aid of computer we have separated the P=S bands and measured the relative intensities of each sub‐band at different temperatures, so the relation of interconversion between isomers was obtained. Moreover, there exists intermolecular hydrogen bond in this compound, which will impede the rotation of S‐H about P‐S bond. Therefore, the interconversion of isomers results only from the rotation of O‐CH 3 about P‐O bond.