SOME ORGANOPEROXO COMPLEXES OF TIN(IV)

Some novel organoperoxo complexes of tin were prepared by the oxidativ e addition of dioxygen Sn2+. These are the first reported examples of this kind. The complexes isolated the compositions [Sn(O-2)(2).2L], [S n(O-2)(2)L'], [Sn(O-2)L''(2)], [Sn(O-2)C5H3N(COO)(2)H2O] and [Sn(O-2)( 2)L'''] (L=pyridine, pyridine N-oxide, triphenylphosphine oxide, anili ne; L'=ethylenediamine, 2-aminopyridine, o-phenylenediamine; L''=pyrid ine-2-carboxylato, 2-aminophenolato, quinolin-8-olato, glycinato; L''' =diethylenetriamine and triethylenetetramine). The complexes were char acterized by elemental analysis, conductivity measurements and infrare d spectroscopic studies. None of these complexes showed oxygen transfe r reactions. The v(1)(O-O) stretching frequencies appear at 805-820 cm (-1), and are significantly insensitive to the choice of the coligands used. Extensive p pi-d pi bonding in the complexes renders absolute k inetic stability to the complexes.