Organonitrogen groups in metal carbonyl complexes. Part III. Comparison of alkylarylmethyleneamino-complexes of molybdenum and tungsten with the corresponding dialkyl- and diaryl-methyleneamino-complexes

Abstract

The properties and reactions of complexes of the type [(π-C₅H₅)M(CO)₂N:CRR′](M = Mo, W; R = Ph, R′= Bu^t) closely resemble those of the di-t-butyl rather than the diphenyl derivatives. Complexes of the type [(π-C₅H₅M(CO)N:CBu^tPh]₂ and [(π-C₅H₅)M(CO)₂(PhBu^tPh)] were not formed. With triphenylphosphine, the Mo complex formed a substitution product [(π-C₅H₅)Mo(CO)(PPh₃)N:CBu^tPh], in contrast to all other methyleneamino-complexes studied. With iodine, substitution analogous to that of the di-t-butyl complex, resulted in the formation of [(π-C₅H₅)M(CO)I₂N:CBu^tPh]. The reaction of PhBu^tC:NSiMe₃ with [(π-C₅H₅)Mo(CO)₃Cl] in monoglyme gave [(π-C₅H₅)Mo(CO)₂(HN:CBu^tPh)Cl].