Poly[[μ4-4-(carb­oxylato­meth­yl)benzoato]zinc(II)]

In the title compound, [Zn(C9H6O4)]n, the ZnII cations are coordinated in a tetra­hedral fashion by carboxyl­ate O-atom donors belonging to four 4-(carb­oxy­meth­yl) benzoate (4-cmb) ligands. Each 4-cmb ligand binds to four ZnII cations in an exo­tetra­dentate fashion to create a non-inter­penetrated [Zn(4-cmb)]n three-dimensional coordination polymer network with a new non-diamondoid 66 topology. The crystal studied was refined as an inversion twin.