Raman and infrared spectral studies of selena, sulphinyl, sulphonyl and tellura methyl laurates.

Davies, J. Eric D. and Lie Ken Jie, Marcel S. F. and Bakare, Oladapo (1997) Raman and infrared spectral studies of selena, sulphinyl, sulphonyl and tellura methyl laurates. Chemistry and Physics of Lipids, 85 (2). pp. 175-180. ISSN 0009-3084

Abstract

Raman spectra (300–1200 cm−1) have been recorded for all the positional isomers of the selena (X=Se), sulphinyl (X=SO) and sulphonyl (X=SO2) methyl laurates CH3(CH2)nX(CH2)mCO2CH3, (n+m =9). The Raman spectra of two isomers of the tellura series (X=Te) were also obtained as were the IR spectra of the sulphonyl series. The SeC2 and TeC2 moieties each give two characteristic Raman bands at 564 and 651 cm−1 and 510 and 600 cm−1 respectively. The SO group gives a characteristic Raman band at 1016 cm−1. The symmetric stretching and bending modes of the SO2 group can be observed in both the IR and Raman spectra at 1109 and 517 cm−1 respectively. These quoted values do change when the functional group is near the carbonyl group or towards the end of the alkyl chain