Infrared Spectra of Gaseous and Solid Digermane

Abstract

The infrared spectra of gaseous and solid Ge₂H₆ have been studied in the spectral region 400—4000 cm^—1. The infrared‐active fundamental frequencies are as follows: A_2u: 2078, 755; E_u: 2114, 898, and 407 cm^—1. Assignment of combination bands gives the remaining fundamentals: A_1g: 2070, 765, 229; A_1u: 144; E_g: 2150, 875, and 417 cm^—1. From the torsional frequency, a cosine barrier to internal rotation is 1200 cal. The structure of the perpendicular band at 898 cm^—1 has been resolved, giving information connecting the Coriolis constant for this vibration with the molecular structure parameters. The spectrum of the solid, obtained at 90°K, shows only those fundamentals active in the gas phase. Small splittings or satellites are observed, and possible crystal symmetries are suggested.