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Acta Cryst. (2007). E63, m3110 [ doi:10.1107/S1600536807057765 ]
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4-benzene-1,3-dicarboxylato)diterbium(III)]Abstract: The title terbium coordination polymer, {[Tb2(C8H4O4)3(H2O)2]}n, was obtained by the hydrothermal reaction of Tb(NO3)3 with benzene-1,3-dicarboxylic acid (1,3-BDC) in alkaline aqueous solution. In the asymmetric unit, there are two crystallographically independent TbIII ions: one seven-coordinate Tb centre is coordinated by six O atoms from six 1,3-BDC ligands and one water molecule, and the other Tb centre is eight-coordinate and surrounded by seven O atoms from six 1,3-BDC ligands and one water molecule. The bridging ligands link the metal centres, forming a three-dimensional network which is further stabilized by hydrogen-bonding interactions. One benzene ring is disordered over two positions with site occupancies of 0.60 (3) and 0.40 (3).
Online 23 November 2007
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