Addition of stabilized carbanions to cationic (eta(6)-arene)tricarbonylmanganese complexes: Syntheses of homo (Mn-Mn) and hetero (Mn-Cr) dinuclear complexes

The reaction of secondary alpha-cyano or alpha-sulfonyl carbanions with cat ionic (eta(6)-arene)tricarbonylmanganese complexes affords neutral mono- an d dinuclear tricarbonyl(eta(5)-cyclo-hexadienyl)manganese complexes. The X- ray analyses of three (eta(5)-cyclohexadienyl)Mn complexes (two mononuclear and one dinuclear) obtained by addition of alpha-cyano carbanion to cation ic (eta(6)-arene)manganese complexes are reported. The addition of benzylic carbanions of (eta(6)-arene)tricarbonylchromium complexes to cationic (eta (6)-arene)manganese complexes gives rise to the formation of the correspond ing heterodinuclear [(eta(5)-cyclohexadienyl)-manganese-(eta(6)-arene)chrom ium] complexes.