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