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. Can. J. Chem. 53,3542 (1975). The molecular structure of tetramethylgermane has been determined by vapor phase electron diffraction. The structural parameters, based on r, interatomic distances are r(GeC) = 1 .945 i 0.003 A, r(CH) = 1.12 _+ 0.02 A, and L(GeCH) = 108 i 2". Tetrahedral symmetry of the GeC4 skeleton was preserved in the analysis by including a shrinkage correction for the C...C interatomic distance. The quoted uncertainties were estimated to include both systematic and random errors.J. LAWRENCE HENCHER et FRANCIS S. MUSTOE. Can. J. Chem. 53,3542 (1975). On a determink la structure molkculaire du tktramkthylgermane par diffraction klectronique en phase vapeur. Les paramktres structuraux, bags sur des distances interatomiques r,, sont r(GeC) = 1.945 i 0.003 A, r(CH) = J .J2 i 0.02 A et L(GeCH) = 108 + 2' . La symktrie tktrakdrique du squelette du GeC4 est maintenue dans I'analyse en faisant intervenir une correction pour le raccourcissement de la distance interatomique C...C. On a estimk les incertitudes rapportks en incluant a la fois les erreurs systkmatiques et les erreurs dus au hasard.[Traduit par le journal]