title: OH functionality of germanium(II) compounds for the formation of heterobimetallic oxides.
abstract: Two novel germanium(II) mu-oxo heterobimetallic oxides with different oxidation states at the metal centers have been reported. The reaction of LGeOH [L = N(Ar)C(Me)CHC(Me)N(Ar) (Ar = 2,6-i-Pr(2)C(6)H(3))] with Cp(2)MMe(2) (M = Zr, Hf) in Et(2)O afforded LGeOM(Me)Cp(2) [M = Zr (2), Hf (3)] in moderate yield. Compounds 2 and 3 were characterized by elemental analysis, IR, NMR, EI-MS, and single X-ray structural analysis. Compounds 2 and 3 crystallized in the space group P, and the geometry at the metal centers is tetrahedral. The Ge-O bond lengths of 2 and 3 are very similar (1.797(2) and 1.799(3) Angstroms, respectively), and a bent M-O-M' angle in 2 (143.8(1) degrees) and 3 (141.9(2) degrees) features both oxide systems. Different orientations of the Cp and Me groups of the metal centers were observed, and deviations of the Cp groups were exhibited.
authors.affiliation: Institut für Anorganische Chemie der Georg-August-Universität Göttingen, Germany.
authors.forename: Leslie W
authors.initials: LW
authors.lastname: Pineda
authors.forename: Vojtech
authors.initials: V
authors.lastname: Jancik
authors.forename: Herbert W
authors.initials: HW
authors.lastname: Roesky
authors.forename: Regine
authors.initials: R
authors.lastname: Herbst-Irmer