Rotational Constants of GeH3D and GeHD3

Abstract

The analysis of the rotational structure of the Ge–D stretching fundamental of GeH₃D yields the following values: $$B^{\mathrm{\prime \prime }}{\text{=1.95}}_7{\mathrm{,\hspace{0.17em}\hspace{0.17em}B}}^{\mathrm{\prime \prime }}{\mathrm{-B}}^{\prime }{\text{=0.014}}_2{\text{±0.0017,\hspace{0.17em}\hspace{0.17em}ν}}_0\text{=1520.4±0.2\hspace{0.17em}}{\mathrm{cm}}^{\text{−1}}.$$ A similar analysis of the Ge—H stretching mode in GeD₃H yields for this molecule: $$B^{\mathrm{\prime \prime }}{\text{=1.66}}_5{\mathrm{,\hspace{0.17em}\hspace{0.17em}B}}^{\mathrm{\prime \prime }}{\mathrm{-B}}^{\prime }{\text{=0.012}}_8{\mathrm{,\hspace{0.17em}\hspace{0.17em}\nu }}_0\text{=2112.4±0.2\hspace{0.17em}}{\mathrm{cm}}^{\text{−1}}.$$ The germanium‐hydrogen distance obtained under the assumption that it is unchanged by isotopic substitution is 1.52₉±0.003 and 1.52₅±0.005 in GeH₃D and GeHD₃, respectively.