Effects of pressure on the infrared spectra of some heterocyclic organosilicon and organogermanium compounds

Abstract

Measurements have been made of the infrared spectra of eight solid heterocyclic organosilicon and organogermanium compounds at pressures up to 5 GPa at normal temperature. Evidence is found of reversible conformational changes under pressure, and of phase transitions in some of the compounds. Unexpectedly, it appears that compression does not favour the transannular interaction that exists, in some cases, between the heteroatom (silicon or germanium) and a functional group on the opposite side of the ring.