Distrontium oxalate tetra-hydroxidocuprate(II)

The crystal structure of distrontium oxalate tetra-hydroxidocuprate(II) or poly[tetra-μ-hydroxido-μ₆-oxalato-copperdistrontium], Sr₂(C₂O₄)[Cu(OH)₄] or [Sr₂Cu(C₂O₄)(OH)₄] _n , has been determined in the triclinic space group P1. The asymmetric unit contains one Sr, one Cu, two hydroxide groups, and half of an oxalate anion. By application of inversion symmetry, a square-planar {Cu(OH)₄} unit and a complete oxalate anion are generated. The structure consists of a three-dimensional framework of edge-sharing {SrO₄(OH)₄} polyhedra decorated by {Cu(OH)₄} units and oxalate groups. Only weak hydrogen bonds are observed within the framework.