R factor = 0.028; wR factor = 0.068; data-to-parameter ratio = 15.9. The microwave solvothermal reaction of nickel nitrate with trimesic acid provided the title compound, [Ni3(BTC)2(H2O)12]n (BTC = benzene-1,3,5-tricarboxylate anion, C9H3O6), which is a metal coordination polymer composed of one-dimensional zigzag chains. The crystal under investigation was ramecically twinned with an approximate twin domain ratio of 1:1. In the asymmetric unit, there are two types of Ni atoms. One of the NiO6 groups (2 symmetry) is coordinated to only one carboxylate group and thus terminal, the other is bridging, forming the coordination polymer. The extended chains are connected by the organic BTC anions via 2-linkages. O—H O hydrogen bonds and – interactions between the chains [centroid–centroid distance 3.58 (1) A ˚] induce the complex to mimic a three-dimensional structure. Related literature For background information on the solvothermal synthesis of coordination polymers with organic carboxylate ligands, see: Kitagawa et al. (2004)
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