Crystal structure of (perchlorato-kO)(1,4,7,10-tetraazacyclododecane-k4N)copper(II) perchlorate.

The crystal structure of the title salt, [Cu(ClO4)(C8H20N4)]ClO4, is reported. The CuII ion exhibits a square-pyramidal geometry and is coordinated by the four N atoms of the neutral 1,4,7,10-tetraazacyclododecane (cyclen) ligand and an O atom from one perchlorate anion, with the second perchlorate ion hydrogenbonded to one of the amine N atoms of the cyclen ligand. Additional N-H…O hydrogen bonds between the amine H atoms and the coordinating and noncoordinating perchlorate groups create a three-dimensional network structure. Crystals were grown from a concentrated methanol solution at ambient temperature, resulting in no co-crystallization of solvent. [ABSTRACT FROM AUTHOR]