Spectra and structure of organogermanes: 21—Infrared and Raman spectra, and vibrational assignment of (CH3)3GeNNN and Normal coordinate calculations of (CH3)3GeNNN, (CH3)3GeNCO and (CH3)3GeNCS

Publisher Website
Google Scholar
Abstract
The Raman spectra of gaseous, liquid and solid trimethylgermylazide, (CH3)3GeNNN, and the infrared spectra of the gas and solid have been recorded (20–3200 cm−1). Assignment of the fundamentals, based on their depolarization values and group frequencies, is given and discussed. A normal coordinate calculation has been carried out utilizing a modified simple valence force field. The extent of vibrational coupling has been determined. It is believed that the main force constants should be transferable to other substituted trimethylgermanium compounds and, thus, transferability is demonstrated by some normal coordinate calculations for trimethylgermylisocyanate and trimethylgermylisothiocyanate. The bonding in these pseudohalogens is discussed and it is shown that the appropriate resonance structures can account for the linearity of the GeNCS moiety and the non‐linearity of the GeNCO and GeNNN moieties.