摘要:
Reaction of [Ru(Cp*)(CH3CN)(3)](PF6) with P(o-tolyl)(3) affords [Ru(Cp*) {eta(6)-o-tolyl]P(o-tolyl)(2))](PF6) (4) in which the P-atom is not coordinated to the metal. The solid-state structure of 4 has been determined. A related reaction with P(P-tolyl)3 reveals a small quantity [Ru(Cp*){(eta(6)-p-tolyl)P(o-tolyl)(2)}](PF6), in solution, but mostly the expected bis-phosphine complex. Reaction of the Ru(IV) dication, [Ru(Cp*)(eta(3) -PhCHCHCH2)(DMF)(2)](PF6)(2), with P(o-tolyl)(3) gives a mixture of the phosphonium salt, C6H5CH=CHCH2P(o-tolyl)(3) (9) and the dication [Ru(Cp*)(eta 6-C6H5CH=CHCH2P(o-tolyl)(3))](PF6)(2) (10)- Salt 9 forms via attack of the P-atom on the allyl ligand. The latter product results from complexation of 9 via the phenyl group of the former allyl ligand. It would seem that the sterically demanding P(o-tolyl)(3) ligand is not readily compatible with the Ru(Cp*) fragment, in either the +2 or +4 oxidation state. Detailed NMR studies are reported. (c) 2007 Elsevier B.V. All rights reserved.