Triaquabis[bis(3,5-dimethyl-1,2,4-triazol-1-yl)methane-κN4]copper(II) bis(perchlorate)

The title compound, [Cu(bdtm)2(H2O)3](ClO4)2 [bdtm is bis­(3,5-dimethyl-1,2,4-triazol-1-yl)methane, C9H14N6], is the first example of a mononuclear copper complex with monodentate bdtm ligands. In the cation, which possesses crystallographically imposed twofold rotation symmetry, the CuII atom is coordinated by the two N atoms [Cu—N = 2.009 (3) Å] from two symmetry-equivalent bdtm ligands and three O atoms [Cu—O = 1.949 (3) and 2.232 (6) Å] from the water mol­ecules in a distorted trigonal–bipyramidal geometry.