Acta Crystallographica Section C

Crystal Structure Communications

Volume 63, Part 7 (July 2007)

metal-organic compounds

gz3091 scheme

Acta Cryst. (2007). C63, m283-m288 [ doi:10.1107/S0108270107022950 ]

-Tris(2,4-pentanedionato-²O,O')cobalt(III) at 240, 210, 180, 150 and 110 K

L. S. von Chrzanowski, M. Lutz and A. L. Spek

Abstract: The crystal structure of the title compound, [Co(C₅H₇O₂)₃], has been investigated by a multi-temperature measurement. In contrast to the isomorphous Al compound, the title compound exists in the studied temperature range as its monoclinic [alpha] polymorph (space group P2₁/c) and does not undergo a phase transition. Rigid-body TLS analyses have been performed and the anisotropic thermal expansion tensor [alpha] _ij has been determined. The cell axes show a linear expansion behavior with respect to the temperature, but the slope is significantly different. A possible explanation are the different strengths of different intermolecular C-HO contacts, which run in different crystallographic directions.

Formula: [Co(C₅H₇O₂)₃] at 240, 210, 180, 150 and 110 K


	Structure factor file (CIF format) (184.4 kbytes) [ doi:10.1107/S0108270107022950/gz3091Iasup2.hkl ] Contains datablock Ia

	Structure factor file (CIF format) (183.4 kbytes) [ doi:10.1107/S0108270107022950/gz3091Ibsup3.hkl ] Contains datablock Ib

	Structure factor file (CIF format) (182.0 kbytes) [ doi:10.1107/S0108270107022950/gz3091Icsup4.hkl ] Contains datablock Ic

	Structure factor file (CIF format) (181.3 kbytes) [ doi:10.1107/S0108270107022950/gz3091Idsup5.hkl ] Contains datablock Id

	Structure factor file (CIF format) (179.3 kbytes) [ doi:10.1107/S0108270107022950/gz3091Iesup6.hkl ] Contains datablock Ie

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