catena-Poly[[tetraaquanickel(II)]-μ(3)-benzene-1,3,5-tricarboxylato-3':1:2-κO:O,O:O-[tetraaquanickel(II)]-μ(2)-benzene-1,3,5-tricarboxylato-2:3κO:O-[tetraaquanickel(II)]]

Abstract

The microwave solvothermal reaction of nickel nitrate with trimesic acid provided the title compound, [Ni(3)(BTC)(2)(H(2)O)(12)](n) (BTC = benzene-1,3,5-tricarboxyl-ate anion, C(9)H(3)O(6)), 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 NiO(6) 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 μ(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.

Fig. 1.

A view of the title compound, showing 50% probability displacement ellipsoids. [symmetry codes: (i) -x+1, y, -z; (ii) -x+2, y, -z+1].

Fig. 2.

The zigzag chains of the title compound with hydrogen bonding (blue dashed lines, H atoms are omitted).

Fig. 3.

The packing diagram of zigzag chains with hydrogen bonding (blue dashed lines, H atoms are omitted).

Fig. 4.

The side view of the layers with the pi-pi interactions (blue dashed lines, H atoms are omitted).