Acta Cryst. (2009). E65, m1367-m1368  [ doi:10.1107/S1600536809041658 ]

Di--hydroxido-bis[tris(1,1,1,5,5,5-hexafluoroacetylacetonato-²O,O')hafnium(IV)] acetone solvate

J. A. Viljoen, H. G. Visser, A. Roodt and M. Steyn

Abstract: The binuclear title compound, [Hf₂(C₅HF₆O₂)₆(OH)₂]·C₃H₆O, contains an Hf^IV atom which is eight coordinated and surrounded by three chelating -diketonato 1,1,1,5,5,5-hexafluoroacetylacetonate (hfaa) ligands and two bridging OH groups situated on a twofold rotation axis. The HfO₈ 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-HO hydrogen bonding interactions are observed between one of the bridging hydroxy groups and the disordered solvent molecule.

Online 17 October 2009

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