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.
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Decouzon, M., Gal, JF., Gayraud, J. et al. 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 4, 54–57 (1993). https://doi.org/10.1016/1044-0305(93)85042-V
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DOI: https://doi.org/10.1016/1044-0305(93)85042-V