Low-frequency bending motions of the silyl pseudohalides SiH3NCY (Y = O, S, Se). An experimental and theoretical study

Abstract

We report the observation of far-infrared bands assigned to fundamental and overtone transitions involving the low-frequency bending motions of the title compounds and the simulation of the spectrum of silyl isocyanate using energy levels deduced from a potential function involving a pure quadratic well with a central hump of Lorentzian form. The observed spectra enable this potential to be specified to a higher level of precision than earlier indirect measurements.