AN UNPRECEDENTED TRIDENTATE MODE OF COORDINATION OF A BINAP LIGAND - SYNTHESIS AND CRYSTAL-STRUCTURES OF [RU(ETA-5-C5H5)((R)-(BINAP))]+CF3SO3- AND RU(ETA-5-C5H5)((R)-(BINAP))I
The syntheses and crystal structures of the title compounds are reported. The complex [Ru(eta5-C5H5){(R)-(BINAP)}]+CF3SO- is of particular interest in that it contains a tridentate BINAP ligand co-ordinated to the ruthenium through eta2-bonding to one of the naphthyl rings as well as through both phosphorus atoms. The possible implications of this type of bonding are discussed.