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Barium di-μ-hydroxo-bis[(nitrilo­triacetato)chromium(III)] hexahydrate

✍ Scribed by Visser, Hendrik G.

Publisher
International Union of Crystallography
Year
2006
Tongue
English
Weight
280 KB
Volume
62
Category
Article
ISSN
1600-5368

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✦ Synopsis

The title compound, Ba[Cr 2 (C 6 H 6 NO 6 ) 2 (OH) 2 ]Á6H 2 O, is contains two discrete Cr(nta)OH units (nta 3À is nitrilotriacetate) in the asymmetric unit, each generating a centrosymmetric dimer with two hydroxo bridges. The ten-coordinate Ba 2+ cation provides a link between dimeric units. Each Cr III ion is in a distorted octahedral environment and coordinated by two bridging hydroxo O atoms, plus an N atom and three carboxylate O atoms of the nta 3À ligand. The important geometrical parameters are Cr-N = 2.0716 (19) and 2.0779 (19) A ˚, Cr-O = 1.9421 (17)-1.9900 (17) A ˚, and O-Cr-O = 162.85 (7)-176.90 (7) .

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Single-crystal X-ray study T = 173 K Mean '(C±C) = 0.005 A Ê R factor = 0.045 wR factor = 0.115 Data-to-parameter ratio = 11.0 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.