Some Organoperoxo Complexes of Tin(IV)

Abstract

Some novel organoperoxo complexes of tin were prepared by the oxidative addition of dioxygen with Sn ²⁺. These are the first reported examples of this kind. The complexes isolated have the compositions [Sn(O₂)₂.2L], [Sn(O₂)₂L′], [Sn(O₂)L′′₂], [Sn(O₂)C₅H₃N(COO)₂H₂O] and [Sn(O₂)₂L′′′] (L = pyridine, pyridine N-oxide, triphenylphosphine oxide, aniline; L′ = ethylenediamine, 2-aminopyridine, o-phenylenediamine; L′′ = pyridine-2-carboxylato, 2-aminophenolato, quinolin-8-olato, glycinato; L′′′ = diethylenetriamine and triethylenetetramine). The complexes were characterized by elemental analysis, conductivity measurements and infrared spectroscopic studies. None of these complexes showed oxygen transfer reactions. The &ngr;₁(O-O) stretching frequencies appear at 805-820 cm^-1 , and are significantly insensitive to the choice of the coligands used. Extensive pp-dp bonding in the complexes renders absolute kinetic stability to the complexes.