Alcoholysis of gauche-1,2-(η3-Cp)2W2(NMe2)4: Structural evidence for WW bond cleavage and proton transfer to bound cyclopentadiene

1,2-W2Cp2(NMe2)4 reacts with aliphatic alcohols MeOH, EtOH, and PrOH to form Cp2WH2 and W(OR)6. Reactions with excess CF3CH2OH gives a mixture of two pentanesoluble, crystalline products formulated as 1,1-W2(η5-Cp)(η3-C5H7)W2(OCH2CF3)6and complex salt W(OCH2CF2)2][H2NMe2] [Cp2W(H)x(OCH2CF3)] where x = 1 or 2.