Polarizability effect in silatranes and related compounds

The dipole moments (μ) of the molecules, the dipole moments (μDA) and the length (dDA) of the Si ← N bonds, and the electrochemical oxidation potentials (Ep) of Si-substituted silatranes, the dipole moments (μhs) of the molecules of Si-substituted 3-homosilatranes as well as the enthalpies of formation (ΔH0) of the intermolecular complexes of SiF4 with aniline derivatives depend not only on the inductive and resonance effects, but also on the polarizability of substituents which can be characterized by the σα constants.