DERIVATIVES OF MONOGERMANE: PART I. THE VIBRATION–ROTATION SPECTRA OF GERMYL FLUORIDE AND BROMIDE

Abstract

The vibration–rotation infrared absorption spectra of germyl fluoride and bromide have been observed. All of the fundamentals in GeH₃F were located, and the rotational structure of the E-type bands were resolved and analyzed. The low-frequency band, ν₃(a₁), in GeH₃Br was not observed but an estimate of its position was made from the frequencies of the combination band ν₃ + ν₆ and of ν₆. The rotational constant A″ and the Coriolis constants ζ₄, ζ₅, and ζ₆ were calculated for both molecules, and agreement with microwave A″ values was satisfactory. Thermodynamic functions based upon a rigid-rotator, harmonic-oscillator model have been evaluated for germyl fluoride and bromide.