Si-Cl bond distances

We shall now consider some properties of M—X bonds (M = Ge, Sn, Pb) in comparison with Si—X and C—X. As the atomic number of M increases, these bond distances d (Table 2) become longer. It is caused by the increase in the covalent radius of the group 14 element as its atomic number rises. The d values of the Me3M—Me and Me3M—MMe3 bonds coincide to within 0.05 A with the sum of covalent radii of the atoms forming this bond. The Si—Cl bond distances in SiCLt are 0.15 A shorter than the sum of covalent radii of Si and Cl atoms. As the atomic number of M increases, the difference between the experimental d values in MCLj molecules and the expected ones (based on the sum of the... 

Si-Cl Bond Distances and Free-Energy Barriers for the Low-Energy Ligand-Site Exchange in Hexacoordinate Complexes... 

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