title: Di-μ-hydroxido-bis[tris(1,1,1,5,5,5-hexa-fluoro-acetyl-acetonato-κO,O')hafnium(IV)] acetone solvate.
abstract: The binuclear title compound, [Hf(2)(C(5)HF(6)O(2))(6)(OH)(2)]·C(3)H(6)O, contains an Hf(IV) atom which is eight coordinated and surrounded by three chelating β-diketonato 1,1,1,5,5,5-hexa-fluoro-acetyl-acetonate (hfaa) ligands and two bridging OH groups situated on a twofold rotation axis. The HfO(8) coordination polyhedron shows a slightly distorted Archimedean square anti-prismatic coordination with average Hf-O, C-O, C-C(Me) distances of 2.19 (2), 1.26 (2) and 1.49 (2) Å, respectively, and an O-Hf-O bite angle of 75.3 (5)°. Weak O-H⋯O hydrogen bonding inter-actions are observed between one of the bridging hydr-oxy groups and the disordered solvent mol-ecule.
authors.affiliation: Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein, 9300, South Africa.
authors.forename: J Augustinus
authors.initials: JA
authors.lastname: Viljoen
authors.forename: Hendrik G
authors.initials: HG
authors.lastname: Visser
authors.forename: Andreas
authors.initials: A
authors.lastname: Roodt
authors.forename: Maryke
authors.initials: M
authors.lastname: Steyn