catena-Poly[[diaqua-cadmium(II)]bis-(μ-2,2-dimethyl-butane-dioato-κO,O':O'',O''')[diaqua-cadmium(II)]-μ-1,4-bis-(3-pyridylmeth-yl)piperazine-κN:N]

Abstract

In the title compound, [Cd(2)(C(6)H(8)O(4))(2)(C(16)H(20)N(4))(H(2)O)(4)](n), penta-gonal-bipyramidally coordinated Cd(II) ions are connected into {Cd(2)(2,2-dimethyl-succinate)(2)(H(2)O)(4)} centrosymmetric dimeric clusters. In turn, these clusters are linked by tethering 1,4-bis-(3-pyridylmeth-yl)piperazine (3-bpmp) ligands into [Cd(2)(2,2-dimethyl-succinate)(2)(3-bpmp)(H(2)O)(4)](n) coordination polymer chains. The chain motifs are oriented parallel to [10]. Individual chains are connected into supra-molecular layers via O-H⋯N and O-H⋯O hydrogen-bonding mechanisms.

Fig. 1.

The coordination environment and dinuclear cluster of the title compound, showing 50% probability ellipsoids and partial atom numbering scheme. Hydrogen atom positions are shown as grey sticks. Color codes: violet Cd, red O, light blue N, black C. Symmetry code: (i) -x, -y + 1, -z + 1.

Fig. 2.

A single [Cd2(2,2-dimethylsuccinate)2(H2O)4 (3-bpmp)]n coordination polymer chain

Fig. 3.

Supramolecular layer of [Cd2(2,2-dimethylsuccinate)2(H2O)4 (3-bpmp)]n chains. Although the H atoms have been omitted the O—H···N and O—H···O hydrogen bonds are shown as dashed lines between the donor and acceptor atoms.

Fig. 4.

Stacking of supramolecular layers in the title compound.