Low-temperature redetermination of hexa-kis(μ-chloro-acetato-κO:O')-μ(3)-oxido-tris[aquachromium(III)] nitrate 3.5-hydrate.

Ng, S.W. (2008) Low-temperature redetermination of hexa-kis(μ-chloro-acetato-κO:O')-μ(3)-oxido-tris[aquachromium(III)] nitrate 3.5-hydrate. Acta crystallographica. Section E, Structure reports online, 64 (Pt 8). m1102. ISSN 1600-5368

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Abstract

A low-temperature redetermination of the trinuclear cluster compound described as [Cr(3)(C(2)H(2)ClO(2))(6)O(H(2)O)(3)]NO(3)·3H(2)O [Glowiak, Kubiak & Jezowska-Trzebiatowska (1977 ▶). Bull. Acad. Pol. Sci. Ser. Sci. Chim.25, 359-371] shows that the salt is a 3.5-hydrate, [Cr(3)(C(2)H(2)ClO(2))(6)O(H(2)O)(3)]NO(3)·3.5H(2)O. The trinuclear cluster cation is disordered in four of the six monochloro-acetate groups. One is disordered over two positions in respect of the chloro-methyl atoms (occupancy ratio 0.50:0.50); another is disordered over three positions in respect of the chloro-methyl atoms (occupancy ratio 0.50:0.37:0.13) whereas two are disordered over two positions in respect of the Cl atoms only (occupancy ratios 0.84:0.16 and 0.60:0.40). Of the four independent uncoordinated water mol-ecules, one has an occupancy factor of 0.5. The trinuclear cation has an oxido O atom that is connected to three water-coordinated Cr(III) atoms, the three metal atoms forming the points of an equilateral triangle. Six carboxyl-ate groups each chelate a Cr-O-Cr fragment. The cations, anions and uncoordinated water mol-ecules are linked by hydrogen bonds.

Item Type: Article
Creators:
  1. Ng, S.W.
Journal or Publication Title: Acta crystallographica. Section E, Structure reports online
Uncontrolled Keywords: Chemistry
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Dept of Chemistry
Depositing User: Mr. Faizal Hamzah
Date Deposited: 22 Apr 2011 11:50
Last Modified: 22 Apr 2011 11:50
URI: http://eprints.um.edu.my/id/eprint/919

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