Two approaches to phosphaniminocarbyne complexes

Abstract

The first phosphaniminocarbyne complexes [W(CNPPh₃)(CO)₂(Tp*)] (Tp* = tris(dimethylpyrazolyl)borate) and trans-[W(CNPPh₃)Br(CO)₄] arise from the reactions of the fluorocarbyne [W(CF)(CO)₂(Tp*)] with Me₃SiNPPh₃ and of Na[W(CN)(CO)₅] with Ph₃PBr₂. The C–N–P linkage in [W(CNPPh₃)(CO)₂(Tp*)] is bent in contrast to linear iminocarbynes L_nMCNCR₂ but shows negligible nucleophilicity at nitrogen.