Abstract
The acetylene complexes Cp′(CO) 2MnC 2H 2 (Cp′ = η 5-C 5H 5, η 5-C 5H 4Me, η 5-C 5Me 5) react with ammonia, primary, or secondary amines such as methylamine or dimethylamine to give aminocarbene complexes of the type Cp′(CO) 2Mn[C(Me)NR 1R 2] (R 1, R 2 = H, Me). With tertiary amines such as triethylamine, C 5H 4Me(CO) 2MnC 2H 2 is transformed into the binuclear vinylidene bridged complex [C 5H 4Me(CO) 2Mn] 2-μ-CCH 2. Hydrazine, N 2H 4, and phenylhydrazine, N 2H 3Ph, react analogous to that of the amines, NHR 1R 2. The resulting complexes Cp′(CO) 2Mn[C(Me)N 2H 3] and Cp′(CO) 2Mn[C(Me)N 2H 2Ph], however, readily lose NH 3 or NH 2Ph to give the acetonitrile complexes Cp′(CO) 2MnNCMe. The X-ray structures of the aminocarbene complexes C 5H 4Me(CO) 2Mn[C(Me)NH 2] (IIa′), C 5Me 5(CO) 2Mn[C(Me)NH 2] (IIa″), C 5Me 5(CO) 2Mn[C(Me)NMe 2] (IIc″) and of the acetonitrile complex C 5Me 5(CO) 2MnNCMe (IV″) are presented and compared with structures of similar complexes.
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