Organonitrogen groups in metal carbonyl complexes. Part X. Carbonylation studies

Abstract

A possible mechanism for the carbonylation of amines and other nitrogen-containing molecules, which involves insertion into a transition metal–nitrogen bond, has been tested. Attempts to insert carbon monoxide into such bonds of [M(η⁵-C₅H₅)(CO)₂X][M = Mo or W; X = N:CR₂(R = Bu^t or p-tolyl), R₂CNCR₂(R = Ph, p-tolyl, or p-CF₃C₆H₄), RNC(R′)NR (R = R′= Ph; R = Ph, R′=p-tolyl)], [Mn(CO)₄X]{X = RNC(R′)NR (R = R′= Ph)}, and [Fe(π-C₅H₅)(CO)₂(Nph₂)], produced [{(η⁵-C₅H₅)M(CO)_n}₂](M = Mo or W, n= 3: M = Fe, n= 2) and/or the binary metal carbonyls. No evidence was obtained for the formation of carbamoyl complexes.