Highly reduced organometallics. XII. The reaction of a carbonyltungstate anion with triphenyltin chloride resulting in a phenyltin bond cleavage. X-ray structural characterization of the novel salt: [Me₄N][(Ph₃Sn)₂{(Ph₂Sn)₂O-i-Pr}W(CO)₃]

The reaction of a highly reduced tricarbonyltungstate species with triphenyltin chloride results in an unprecedented phenyl-tin cleavage and the formation of an unusual substituted carbonyl anion. The X-ray structure of [Me₄N][(Ph₃Sn)₂-{(Ph₂Sn)₂O-i-Pr}W(CO)₃] shows the presence of seven coordinate tungsten bound to three terminal carbonyl groups, two triphenyltin units and a previously unknown isopropoxo-bis(diphenyltin) bidentate ligand. The seven ligating atoms are disposed in an approximate 4 : 3 piano stool arrangement about the central tungsten atom. Crystal data: Space group P2₁/c, a 22.580(10), b 14.162(4), c 23.070(10) Å, β 114.21(4)°, Z = 4, V 6728(1) ų, ρ{variant}(calc) 1.626 g cm^-3.