Fourier transform-ion cyclotron resonance study of the gas-phase acidities of germane and methylgermane; Bond dissociation energy of germane

M Decouzon; J F Gal; J Gayraud; P C Maria; G A Vaglio; P Volpe

doi:10.1016/1044-0305(93)85042-V

Fourier transform-ion cyclotron resonance study of the gas-phase acidities of germane and methylgermane; Bond dissociation energy of germane

J Am Soc Mass Spectrom. 1993 Jan;4(1):54-7. doi: 10.1016/1044-0305(93)85042-V.

Authors

M Decouzon¹, J F Gal, J Gayraud, P C Maria, G A Vaglio, P Volpe

Affiliation

¹ Laboratoire de Chimie Physique Organique, Groupe FT-ICR, Université de Nice-Sophia Antipolis, Part Valrose, 06108, Nice Cédex 2, France.

PMID: 24234744
DOI: 10.1016/1044-0305(93)85042-V

Abstract

An accurate gas-phase acidity for germane (enthalpy scale, equivalent to the proton affinity of GeH3 (-)), ΔH acid (o)(GeH4) = 1502.0 ± 5.1 kJ mol(-1), is obtained by constructing a consistent acidity ladder between GeH4, and H2S by using Fourier transform-ion cyclotron resonance spectrometry, and 0 and 298.15 K values for the first bond dissociation energy of GeH4 are proposed: D0 (o)(H3Ge-H) = 352 ± 9 kJ mol(-1); D (o)(H3Ge-H) = 358 ± 9 kJ mol(-1), respectively. These results are compared with experimental and theoretical data reported in the literature. Methylgermane was found to be a weaker acid than germane by approximately 35 kJ mol(-1): ΔH acid (o) = 1536.6 kJ mol(-1).