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CuII atoms exhibit different octa­hedral coordination geometries in two crystallographically independent one-dimensional chains. Extensive hydrogen bonding is observed among perchlorate anions, water mol­ecules and N-(4-methyl­pyrimidin-2-yl)pyrazin-2-amine ligands, and the one-dimensional chains are further linked to form a three-dimensional structure through inter­chain O-H...O and N-H...O hydrogen-bonding inter­actions.
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