Infrared Spectra of Gaseous and Solid Digermane

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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: A2u: 2078, 755; Eu: 2114, 898, and 407 cm—1. Assignment of combination bands gives the remaining fundamentals: A1g: 2070, 765, 229; A1u: 144; Eg: 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.