The structure of tetramethyldistibine has been investigated in the gas at 74 °C by electron diffraction. Although gauche and anti forms of the molecule probably exist, it was not possible to determine the rotomeric composition because of the small relative scattering from the torsion-sensitive distances. The results for the more important distances bond angles and amplitudes of vibration with estimated are r(Sb-Sb) = 281.8 (4) pm, r(Sb-C) = 216.6 (4) pm, r(C-H) = 109.8 (10) pm, z(SbSbC) = 95.5 (7)°, = 102.7 (65)°, = 114.3 (23)°, = 6.9 (4) pm, = 5.4 (5) pm, and = 5.9 (11) pm. The Sb-Sb bond length is definitely shorter than it is in the crystal. The longer bonds in the crystal probably result from electron delocalization along chains of Sb atoms which results in a decrease of the bond order of the Sb-Sb bonds.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry