SYNTHESIS AND REACTIONS OF DICARBONYL (ETA(2)-INDENE)-ETA(5)-INDENYL COMPLEXES OF MANGANESE AND RHENIUM

Photochemical reactions of M(CO)3(eta5-C9H7), where M = Mn (1) or Re ( 2), with indene have produced eta2-indene complexes M(CO)2(eta2-C9H8)( eta5-C9H7), where M = Mn (3) or Re (4). Deprotonation of complex 3 wit h t-BuOK in THF at -60-degrees-C gives the anion [Mn(CO)2(eta1-C9H7)(e ta5-C9H7)- (5), in which there occurs a rapid interchange of the Mn(CO )2(eta5-C9H7) group between positions 1 and 3 in the eta1-indenyl liga nd. The reaction of complex 4 with Ph3CPF6 in CH2Cl2 at 0-degrees-C le ads to the complex [Re(CO)2(eta 3-C9H7)(eta5-C9H7)PF6, whereas the sim ilar reaction of complex 3 gives only decomposition products even at - 20-degrees-C.