Acta Cryst. (2007). E63, m1666  [ doi:10.1107/S1600536807022519 ]

Poly[[diaquatris[₄-(p-phenylenedioxy)diacetato]dipraseodymium(III)] dihydrate]

R.-H. Zeng, Y.-C. Qiu, Y.-P. Cai, J.-Z. Wu and H. Deng

Abstract: The title praseodymium coordination polymer, {[Pr₂(C₁₀H₈O₆)₃(H₂O)₂]·2H₂O}_n, was obtained by the hydrothermal reaction of Pr(NO₃)₃ with (p-phenylenedioxy)diacetic acid in alkaline aqueous solution. Each Pr^III atom is coordinated by nine O atoms, eight from four (p-phenylenedioxy)diacetate ligands and one from a water molecule, displaying a tricapped trigonal prismatic geometry. There is a centre of symmetry at the mid-point of the PrPr vector. The bridging ligands crosslink the metal ions to form a three-dimensional network, with channels running along the c axis in which the uncoordinated water molecules are located. The crystal structure is stabilized by intermolecular O-HO hydrogen-bonding interactions.

Online 23 May 2007

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