| Summary: | In the title compound, [CuCl2(C4H4N2O)(H2O)], the CuII cation is coordinated by two chloride anions, one pyrimidin-2-one N atom and one water molecule, giving a slightly distorted square-planar geometry. In the crystal structure, the pyrimidin-2-one rings stack along the b axis, with an interplanar distance of 3.306 Å, as do the copper coordination planes (interplanar spacing = 2.998 Å). The coordination around the Jahn–Teller-distorted CuII ion is completed by long Cu...O [3.014 (5) Å] and Cu...Cl [3.0194 (15) Å] interactions with adjacent molecules involved in this stacking. Several N—H...Cl, O—H...Cl and O—H...O intermolecular hydrogen bonds form a polar three-dimensional network.
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