Poly[(aquacalcium)-μ4-pyrazine-2,3-dicarboxylato]

Abstract

The polymeric title compound, [Ca(C6H2N2O4)(H2O)]n, was synthesized from pyrazine-2,3-dicarboxylic acid and calcium dichloride under hydrothermal conditions. The Ca2+ cation is seven-coordinated by five O atoms and one N atom of four pyrazine-2,3-dicarboxylate anions, and one water molecule. The complete deprotonated pyrazine-2,3-dicarboxylate anion adopts a μ4-coordination mode, resulting in the formation of a three-dimensional structure.