Ambiphilic Reactivity of a Phosphane-Functionalized Cycloheptatrienyl-Cyclopentadienyl Zirconium Sandwich Complex

摘要

The reactions of the phosphane-functionalized cycloheptatrienyl-cyclopentadienyl sandwich complex [(η7-C7H7)Zr(η5-C5H4PiPr2)] (1) with selenium, [(tht)AuCl] (tht=tetrahydrothiophene) and [(η6-C7H8)W(CO)3] (C7H8 = 1,3,5-cycloheptatriene) afford the complexes [(η7-C7H7)Zr- {η5-C5H4P(Se)iPr2}] (2), [(1)2AuCl] (3), and [(1)2W(CO)3] (4). Because of the presence of a Lewis basic phosphane moiety and a Lewis acidic zirconium atom, ambiphilic behavior of the metallo ligand 1 is observed, and the structural characterization of the complexes 2-4 reveals intramolecular secondary Zr-Se (2), Zr-Cl (3), and Zr-O (4) interactions, respectively. In addition, 4 displays an agostic C-H3 3 3W interaction with one of the cycloheptatrienyl rings.