Germanium compounds simple structures

The structures of the simple, tetrahedral, symmetrical tetraorganogermanes serve both as the best measures of Ge—C bond lengths (Table II) unperturbed by the influence of atoms of varying electronegativity bonded to germanium, and also to assess the available theoretical models for the prediction of molecular packing in the solid state. It is somewhat surprising therefore that relatively few compounds of this... 

Little in the way of data sets involving the effect of structural variation on bioactivity is available for compounds of germanium and lead. Some data are available for alkylstannanes37 although the data sets are very limited in both the number of data points and in the extent of variation in the alkyl group structure. The toxicity of trialkylstan-nanes to Botrytis and of dialkylstannanes to B. subtilis (sets BA1 and BA2, Table 7) were modeled using the simple branching equation (equation 4) in the form of equation 85 ... 

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