Penta-aqua-tri-μ(3)-hydroxido-tris-(imino-diacetato)-μ(3)-oxido-tetra-hedro-calcium(II)tricobalt(III) 2.54-hydrate.

Acta Crystallogr Sect E Struct Rep Online

Department of Chemistry, Faculty of Science, Kochi University, Akebono-cho 2-5-1, Kochi 780-8520, Japan.

Published: March 2010

In the title compound, [CaCo(3)(C(4)H(5)NO(4))(3)(OH)(3)O(H(2)O)(5)]·2.54H(2)O, the Co atom is octa-hedrally coordinated by one imino-diacetate (ida) dianion as a facial O,N,O'-tridentate ligand, two μ(3)-OH groups and one μ(3)-O ligand, forming an partial Co(3)O(4) cubane cluster. This unit coordinates to a Ca(II) cation in an O,O',O''-tridentate fashion, generating a distorted CaCo(3)O(4) cubane-type cluster. The Ca-μ(3)-O distances [2.429 (5)-2.572 (6) Å] are much longer than the Co-μ(3)-O bonds [1.895 (5)-1.941 (5) Å]. The Ca(II) cation is also coord-inated by five water mol-ecules with Ca-O distances in the range 2.355 (6)-2.543 (6) Å. There are three additional uncoordinated water mol-ecules in the asymmetric unit, the occupancy of which refined to 0.54 (3). In H(2)O (or D(2)O), the title complex hydrolyses to Ca(2+) (aq) cations and [Co(3)(ida)(3)(μ(2)-OH)(3)(μ(3)-O)](2-) anions.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2984083PMC
http://dx.doi.org/10.1107/S1600536810010998DOI Listing

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