Abstract
Abstract Raman and IR spectra of 3-chloropropylsilane, ClCH 2 CH 2 CH 2 SiH 3 , and its Si-deuterated analogues were measured in their liquid and solid states. The normal coordinate treatment was carried out and the fundamental vibrations were assigned. The rotational isomerism was investigated by comparing the results for 1-chlorobutane and butylsilane reported in the literature with those obtained from the normal coordinate calculation. All the rotational isomers, e.g., trans-trans (TT), trans-gauche (TG), gauche-trans (GT) and gauche-gauche (GG) forms, except for gauche-gauche′ (GG′) form coexist in the liquid state and only the TT form is found to exist in the solid state. From the temperature dependent measurement of the Raman spectra in the liquid state, the stability of the rotational isomers in the liquid state is found to be in the order of GT > TT > GG > TG.
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