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.