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Rotational Isomerism in CH3CH2-C(=S)SR (R = CH3, CH2CH3): A Combined Vibrational

The vibrational and conformational properties exhibited by CHsCH2C(=S)SCHs and CH~CH~C(=S)SCHZCH3 were studied by Raman and infrared spectroscopies for the liquid and solid phases, and by ab initio calculations for the isolated molecule. It is shown that these molecules tend to adopt nonsymmetricconformations near the C(=S)S group, in contrast to their oxygen analogues whose most stable conformers correspond to...