Collect. Czech. Chem. Commun. 1991, 56, 1180-1183

The conformation of some trimethylsilylesters by spectroscopic methods

Souad F. Al-Azzawia and Marie Jakoubkov√°b

a Petroleum Research Centre, Jadiriya, P.O. Box 10039, Baghdad, Iraq
b Institute of Chemical Processes Fundamentals, Czechoslovak Academy of Sciences, 165 02 Prague 6-Suchdol, Czechoslovakia


The doublet structure of v(C=O) bands in the IR absorption spectra of some trimethylsilylesters of carboxylic acids XCOOY [X = CCl3, CCl2H, CClH2, C(CH3)3, CH2Si(CH3)3] indicates conformational heterogeneity. The conformations of these esters were studied by analyzing the changes in IR spectra caused by solvent and temperature effects.