BOND ANGLES IN HETEROLIGAND MOLECULES AND COMPLEXES - VIBRONIC THEORY

The theoretical consideration of the geometry of heteroligand molecular systems ML(n-k)XY...Z is performed. The bond angles distortions in heteroligand systems in comparison with homoligand systems ML(n) are studied by using the adiabatic potential evaluation in frames of the vibronic approach. The quasioctahedral and quasitetrahedral molecules and complexes of nontransition elements are discussed. The recently discovered anomalous shape of some transition metals complexes is also considered. It is shown that the theory presented successfully permits to explain and predict the bond angles behaviour in various types of molecules and complexes.