Half-Sandwich η5-Indenyl- and η6-Areneruthenium(II) Complexes Bearing the Chiral Ligand (4S)-2-[(Sp)-2-(Diphenylphosphanyl)ferrocenyl]-4-(methylethyl)oxazoline (FcPN)

Abstract

Chiral indenylruthenium(II) [Ru(η5-C9H7){κ2(P,N)-FcPN}(PPh3)][PF6] (1), [Ru(η5-C9H7)Cl{κ2(P,N)-FcPN}] (2) and areneruthenium(II) [RuX(η6-arene){κ2(P,N)-FcPN}][PF6] [η6-arene = p-cymene, X = Cl (6a), H (7), N3 (8); η6-arene = 1,2,3,4-tetramethylbenzene, X = Cl (6b)] complexes containing the chiral ligand (4S)-2-[(SP)-2-(diphenylphosphanyl)ferrocenyl]-4-(methylethyl)oxazoline (FcPN) have been synthesised diastereoselectively. Reaction of 2 with terminal alkynes allows the synthesis of alkynyl [Ru(η5-C9H7)(C≡CR){κ2(P,N)-FcPN}] [R = Ph (3a), p-CH3C6H4 (3b)], allenylidene [Ru(η5-C9H7){κ2(P,N)-FcPN}(=C=C=CPh2)][PF6] (4) and Fischer-type carbene [Ru(η5-C9H7){κ2(P,N)-FcPN}{=C(OMe)CH=CHPh}][PF6] (5) complexes. The structures of complexes 2, 3a and 6a have been determined by X-ray diffraction methods. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)