Facile Generation of Lithiocarbyne Complexes: [M(≡CLi)(CO)₂{HB(pzMe₂)₃}] (M = Mo, W; pz = Pyrazol-1-yl)

Abstract

The reactions of [M(≡CX)(CO)2{HB(pzMe2)3}] (M = Mo, W; X = Cl, Br; pz = pyrazol-1-yl) with nBuLi provide the lithiocarbyne complexes [M(≡CLi)(CO)2{HB(pzMe2)3}], which react with a range of electrophiles to provide variously functionalized carbyne and chalcocarbonyl complexes [Mo(≡CE)(CO)2{HB(pzMe2)3}] (E = H, Me, SiMe3, SPh, SePh, Se−, Te−, Fe(CO)2Cp).