Acta Cryst. (2007). E63, m1889-m1890  [ doi:10.1107/S1600536807028437 ]

Poly[tetraaquabis(₄-cyclohexane-1,4-dicarboxylato-⁶O:O,O':O'':O'',O''')hemi(₂-cyclohexane-1,4-dicarboxylato-²O:O')hemi(₂-cyclohexane-1,4-dicarboxylato-⁴O,O':O'',O''')dipraseodymium(III)]

M. Yu, S.-X. Liu, L.-H. Xie, R.-G. Cao and Y.-H. Ren

Abstract: The title compound, [Pr₂(C₈H₁₀O₄)₃(H₂O)₄]_n is a three-dimensional metal-organic framework built of chains of edge-sharing Pr^III polyhedra by the e,e-trans-cyclohexane-1,4-dicarboxylate (chdc) dianions. There are two types of Pr atoms (one in a ten-coordinate and the other in a nine-coordinate geometry) and four types of chdc ligands. One Pr atom is coordinated by eight carboxylate O atoms from five chdc and two water molecules, whereas the other is coordinated by seven carboxylate O atoms from five chdc and two water molecules. Two of the four chdc ligands are located on inversion centers. The ligation of alternate Pr atoms by the carboxylate groups of chdc ligands leads to an infinite chain; the chains are further connected with six neighboring chains through the chdc ligands, resulting in a three-dimensional network.

Online 13 June 2007

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