Acta Crystallographica Section C

Crystal Structure Communications

Volume 65, Part 2 (February 2009)

metal-organic compounds

Acta Cryst. (2009). C65, m69-m74 [ doi:10.1107/S0108270108043242 ]

Directed anisotropy in bis(acetato-²O,O')diaquazinc(II) at 110 and 250 K

M. Lutz and A. L. Spek

Abstract: The molecule of the title compound, [Zn(C₂H₃O₂)₂(H₂O)₂], is located on a twofold axis in the crystal structure. The displacement parameters and the thermal expansion of the crystal show significant anisotropy. This is explained by the two-dimensional hydrogen-bonded structure, with only very weak interactions perpendicular to it. Besides the overall molecular motion, there are internal vibrations, which cause the Zn-O(carboxylate) bonds to fail the Hirshfeld rigid-bond test. It is shown that this can be interpreted in terms of the steric strain in the four-membered chelate ring due to the bidentate carboxylate coordination.

Formula: [Zn(C₂H₃O₂)₂(H₂O)₂] at 110 and 250 K


	Structure factor file (CIF format) (46.0 kbytes) [ doi:10.1107/S0108270108043242/gz3157Iasup2.hkl ] Contains datablock Ia

	Structure factor file (CIF format) (46.7 kbytes) [ doi:10.1107/S0108270108043242/gz3157Ibsup3.hkl ] Contains datablock Ib

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