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Poly[[triaqua-tri-?(5)-tartrato-dilanthanum(III)] dihydrate].

ABSTRACT: In the title polymer, {[La(2)(C(4)H(4)O(6))(3)(H(2)O)(3)]·2H(2)O}(n), two symmetry-independent La(III) ions are nine-coordinated and display a distorted monocapped square-anti-prismatic geometry. One is coordinated by seven O atoms from four tartrate ligands and two water mol-ecules, the other by eight O atoms from five tartrate ligands and one water mol-ecule. The three tartrate ligands in the asymmetric unit act identically as ?(5)-ligands, which link lanthanum centres to form a three-dimensional coordination framework. An extensive network of hydrogen bonds is observed in the crystal structure, involving two uncoordinated water mol-ecules, one of which is disordered over two positions, with occupancies of 0.550?(13) and 0.450?(13).

SUBMITTER: Shi-Zhu L

PROVIDER: S-EPMC2961792 | biostudies-literature | 2008 Jun

REPOSITORIES: biostudies-literature

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Poly[[triaqua-tri-μ(5)-tartrato-dilanthanum(III)] dihydrate].

Shi-Zhu Liu L

Acta crystallographica. Section E, Structure reports online 20080619 Pt 7

In the title polymer, {[La(2)(C(4)H(4)O(6))(3)(H(2)O)(3)]·2H(2)O}(n), two symmetry-independent La(III) ions are nine-coordinated and display a distorted monocapped square-anti-prismatic geometry. One is coordinated by seven O atoms from four tartrate ligands and two water mol-ecules, the other by eight O atoms from five tartrate ligands and one water mol-ecule. The three tartrate ligands in the asymmetric unit act identically as μ(5)-ligands, which link lanthanum centres to form a three-dimensio ...[more]

PMID: 21202787

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