Dialkyltin Dichloride Research Articles

Spectrophotometric studies of complex formation. Equilibria of some organotin chlorides and tin tetrachloride with 2,2′-bipyridine in solution.

The stability constants of 2,2′-bipyridine complexes of dimethyltin dichloride, di- n-butyltin dichloride and tin tetrachloride were measured spectroscopically, and the tin tetrachloride complex was found to be much more stable than the others. The stability constant for the dibutyltin dichloride complex increases with increasing solvent polarity. From the ultraviolet band maximum, the configuration of 2,2′-bipyridine in complexes formed in solution was determined. Only the chelating form was found for dialkyltin dichlorides, but for tin tetrachloride, the existence of both chelating and bridging forms was suggested.

The Reaction of Dialkyltin Dichlorides with α-Nitroso-β-naphthol

The Reaction of Dialkyltin Dichlorides with α-Nitroso-β-naphthol

The infrared spectra of dialkyltin dialkoxides

The infrared spectra of dialkyltin dialkoxides R 2Sn(OR′) 2 where R — Me, Et, Pr n , Bu n and Oct n and R′ = Me, Et, Pr n and Bu n have been examined in the 1400-400 cm −1 region. Assignments have been made for the asymmetric and symmetric SnO and SnC stretching modes by comparison with the corresponding dialkyltin dichlorides. The SnO and CO frequencies have been correlated to the d π- p π SnO bonding in these compounds. Consideration has been given to the modification of the symmetric methyl and methylene deformation and the methylene rocking frequencies when these groups are directly attached to tin. An empirical correlation has been made of the band pattern obtained, in the 1000-800 cm −1 region, from alkoxyl groups attached to tin.