Fluorocarbyne complexes via electrophilic fluorination of carbido ligands.

The new fluorocarbynes [M([triple bond, length as m-dash]CF)(CO) 2 (Tp*)] (M = Mo, W; Tp* = tris(dimethylpyrazolyl)borate) arise from electrophilic fluorination of the lithiocarbynes [M([triple bond, length as m-dash]CLi)(CO) 2 (Tp*)] with FN(SO 2 Ph) 2 . The reactions of [W([triple bond, length as m-dash]CF)(CO) 2 (Tp*)] with [AuCl(SMe 2 )] and PhICl 2 afford the first μ 2 -fluorocarbyne complex [WAu(μ-CF)Cl(CO) 2 (Tp*)] and the first high oxidation state fluorocarbyne [W([triple bond, length as m-dash]CF)Cl 2 (Tp*)], respectively.