The far infra-red spectra and bonding of some five and six coordinate complex tin ions

Steric effects on the formation of isolable products in the reactions of dibutyltin oxides with carboxylic acids

Molecular adducts of some organotinchlorides with atomatic Schiff bases

Publisher Summary The chapter discusses methyltin halides and their molecular complexes with organic ligands. The halides and their complexes are very promising for the study of the chemistry of organometallic and complex compounds, throwing light on the problem of solvent effects on the kinetics and mechanisms of organometallic reactions. To study the electronic structures arid stereochemistries of methyltin halides and their molecular complexes, infrared (IR) and Raman spectroscopy, nuclear magnetic resonance, nuclear quadrupole resonance, spectroscopy, diffraction, and other techniques are usually employed today. The application of these methods to the objects of interest, and the information to be gained are described in this chapter. The number of researches devoted to the subject has risen steeply during recent years, as is clear from the references cited. The number of electron diffraction and X-ray studies, which give the most unambiguous information on the structures in the gas and solid states, is still rather low. As for solution studies, the use of IR and proton magnetic resonance (PMR) methods has given a satisfactory picture of the electronic structures and stereochemistries of the molecules and their complexes.

Methyltin Halides and Their Molecular Complexes

The general state of research into the ?-acceptor properties of silicon subgroup elements (E) by spectroscopic methods is examined and the data obtained are surveyed. It is shown that the ?-acceptor properties are weakened with increase of the atomic number of the element E, and the analogy between these properties and the conjugation effect in unsaturated carbon compounds is traced. The widespread interpretation of ?-acceptor properties of these elements as a manifestation of the effect of the d??p? interaction is justified. The bibliography includes 167 references.

K.K. Chiu

Papers

Organotin compounds II. π-bonding and the electric dipole moments of some organotin chlorides