Reactions of dichlorobis(2,3-dimethylbutane-2,3-diolato)-tungsten(VI) with water and alcohols

Abstract

A tungsten(VI) complex [WCl₂(pin)₂]1[H₂pin = pinacol (2,3-dimethylbutane-2,3-diol)] reacted with water forming dimeric [W₂O₃(pin)₂(Hpin)₂], but in the presence of tripropylamine [(NPr₃H)₂Cl]₂[W₆O₁₉]2 was formed. The reaction of 1 with H₂pin led to [W(pin)₃] and with phenol (PhOH) to [W(pin)₂(OPh)₂]3. The structures of complexes 2 and 3 were confirmed by X-ray methods. Compound 2 is made up of the known [W₆O₁₉]^2– anion and two [NPr₃H ⋯ Cl^–⋯ HNPr₃]⁺ cations. Complex 3 is formed of monomeric [W(pin)₂(OPh)₂] molecules in which the W atom is octahedrally surrounded by six oxygen atoms.