New classes of zerovalent zirconium carbonyls and related species. Structural characterizations of [Zr(CO) 5(SnMe 3) 2] 2− and [Zr(CO) 4(dppe)SnMe 3] −, dppe = Ph 2PCH 2CH 2PPh 2

Abstract

The first examples of a pentacarbonylzirconium complex, [Zr(CO) 5(SnMe 3) 2] 2− and an arylphosphine substituted zirconium(0) species, [Zr(CO) 4(dppe)SnMe 3] − were obtained by the reaction of [Zr( ν 4-naphthalene) 3] 2− with Me 3SnCl followed by carbonylation in the absence or presence of dppe, respectively. Both compounds were structurally characterized and represent the initial organotin derivatives of Zr(0). Solutions of [Zr(CO) 5(SnMe 3) 4] 2− decompose within hours in CH 3CN at 20°C to provide an especially robust formally divalent zirconium complex, [Zr(CO) 4(SnMe 3) 4] 2− containing eight coordinate zirconium. The latter has been unambiguously characterized by IR, 13C and 119Sn NMR spectra.