High oxidation state aqueous organometallics: synthesis and structure of a dinuclear oxo(pentamethylcyclopentadienyl)acetato complex of molybdenum(IV), [Cp*Mo(μ-O)(μ-O2CCH3)]2
摘要:
The zinc reduction of (Cp2Mo2O5)-Mo-* in a MeOH-H2O mixture in the presence of acetic acid affords the diamagnetic dinuclear compound [Cp*MoO(O2CCH3)](2). An X-ray structural investigation reveals a novel dioxo- and diacetato-bridged structure, with a relatively strong metal-metal bond [2.5524(3) Angstrom]. The compound exhibits a reversible one-electron oxidation process in the cyclic voltammogram. A comparison with other related structures reveals the effect of the electric charge on the mononuclear or dinuclear structural choice. (C) 2002 Elsevier Science B.V. All rights reserved.