Validation for the extended Debye polarisability model was published. Trends in bond angles can be rationalised based on the polarisability (volume) of the atoms. A more polarisable centre atom gives a smaller angle. A more polarisable outer atom gives a larger angle. The fundamental working principle is induction stabilisation.

Ref: G.J. Linker et al., J. Phys. Chem .A, 2020.