A redetermination of the structure and Hirshfeld surface analysis of poly[di­aquadi-μ-hydroxido-tetra­kis­(μ-nicotinato N-oxide)tricopper(II)]

The product obtained from the reaction of pyridine-2,3-di­carb­oxy­lic acid and hydrated copper(II) chloride in hot aqueous NaOH solution was determined by low temperature X-ray diffraction to be [Cu(3)(C(6)H(4)NO(3))(4)(OH)(2)(H(2)O)(2)](n) or [Cu(3)(μ-OH)(2)(μ-nicNO)(4)(H(2)O)(2)](n) (nicNO is pyridine-3-carboxyl­ate N-oxide), a structure obtained from room temperature data and reported previously. The present determination is improved in quality and treatment of the H atoms. A Hirshfeld surface analysis of the inter­molecular inter­actions is presented.