catena-Poly[[tetraaquanickel(II)]- 3-benzene-1,3,5- tricarboxylato-3′:1:2-4 O 1:O 3,O 3′:O 5-[tetraaquanickel(II)]- 2-benzene- 1,3,5-tricarboxylato-2:32 O 1:O 3- [tetraaquanickel(II)]]

Abstract

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-tricarboxyl-ate anion, C 9H3O6), 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 carboxyl-ate 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 π-π inter-actions between the chains [centroid-centroid distance 3.58 (1) Å] induce the complex to mimic a three-dimensional structure.