X-ray crystal and molecular structure of sulphato aquotris(benzotriazole) copper(II)benzotriazole

The complex "Cu(SO4)(btaH)4·2H2O" (btaH = benzotriazole) deposited as deep blue crystals from aqueous CuSO4·5H2OH2SO4btaH solutions been shown by X-ray diffraction methods to be a monohydrate [Cu(SO4)(H2O)(btaH)3·btaH]. The crystals contain five-coordinate, tetragonal pyramidal Cu(SO4)(H2O)(btaH)3 units and bridging btaH molecules linked together by a three-dimensional array of H-bonding interactions.