Vibrational spectra and normal coordinate analysis of germylazide-d o and -d 3

Abstract

The infrared spectra (4000–20 cm −1) of gaseous and solid GeH 3NNN and GeD 3NNN and the Raman spectra (3000–0 cm −1) of liquid and solid GeH 3NNN and GeD 3NNN have been recorded. The vibrational spectrum has been assigned on the basis of C s symmetry. The GeNN bend was observed in the Raman spectrum of the gas at ~150 cm −1; however, the frequency of the GeH 3 torsion could not be determined. A normal coordinate calculation has been carried out by utilizing a modified valence force field. The GeN stretching force constant was found to have a significantly smaller value than the corresponding force constant in GeH 3NCO and GeH 3NCS. A considerable amount of mixing was found between the GeN stretch and the NNN in-plane bend. The frequencies of the normal modes and the normal coordinate analysis of GeH 3NNN are discussed in view of the recent results reported for GeH 3NCO and GeH 3NCS.