Poly[tris(2,5-dimethylbenzene-1,4-dicarboxylato)bis(pyridine)trizinc(II)

Abstract

The asymmetric unit of the title polymeric compound, [Zn3(C10H8O4)3(C5H5N)2]n or [Zn3(dmbdc)3(py)2]n (dmbdc = 2,5-dimethyl­benzene­dicarboxyl­ate; py = pyridine) contains two Zn(II) ions, one of which is located on an inversion centre, one and a half 2,5-dimethyl­benzene­dicarboxyl­ate ligands and one pyridine ligand. Each ZnO6 octa­hedron is sandwiched between two ZnO4N square-pyramids, forming a trinuclear zinc secondary building unit (SBU); each SBU is further linked by six 2,5-dimethyl­benzene­dicarboxyl­ate ligands with six adjacent trinuclear zinc SBU’s, forming a two-dimensional layer structure with a (3,6) net. One of the three zinc ions is octa­hedrally coordinated and the other two are square-pyramidally coordinated. The coordination modes for 2,5-dimethyl­benzene­dicarboxyl­ates are bis­(bidentate) or bidentate-tridentate.