Organonitrogen groups in metal carbonyl complexes. Part I. Diphenyl-methyleneamino-derivatives of π-cyclopentadienyl-molybdenum and-tungsten carbonyl complexes

Abstract

The reactions between diphenylmethyleneaminotrimethylsilane and [M(π-C₅H₅)(CO)₃X](M = Mo or W; X = Cl, Br, l) produce the complexes [M(π-C₅H₅)(CO)₂N:CPh₂] and [{M(π-C₅H₅)(CO)N:CPh₂}₂] in which the methyleneamino-group acts as a three-electron donor. Both types of complexes failed to react with phosphines, but with iodine, complexes of the type [M₃(π-C₅H₅)₃I₃O₄] were formed. Ph₂C:NLi reacts with [M(π-C₅H₅)(CO)₃X] in a 2:1 molar ratio to produce [M(π-C₅H₅)(CO)₂(Ph₂CNCPh₂)], believed to contain an aza-allyl group. The carbon monoxide was eliminated as the cyanate ion.