metal-organic compounds
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-HO and N-HO hydrogen-bonding interactions.