Poly[di-μ2-aqua-μ4-chlorido-μ4-(2-mercaptopyrimidine-4,6-diolato-κ4O:O:O′:O′)-disodium(I)]

Abstract

In the title coordination polymer, [Na2(C4H3N2O2S)Cl(H2O)2]n, the NaI ion lies on a twofold rotation axis and the chloride anion on an inversion center. The NaI ion is six-coordinated by two O atoms from two zwitterionic 2-mercaptopyrimidine-4,6-diolate ligands (mm2 symmetry), two water O atoms (m symmetry) and two Cl atoms in a distorted octahedral geometry. Adjacent NaI ions are bridged by an olate group, a water molecule and a chloride anion into a three-dimensional network. The crystal structure is further stabilized by N—H...Cl, O—H...O and O—H...S hydrogen bonds.