Aqua-(1,4,7,10-tetra-aza-cyclo-dodeca-ne)zinc(II) bis-(perchlorate).

The cationic Zn part of aqua-(1,4,7,10-tetra-aza-cyclo-dodeca-ne)zinc(II) bis-(perchlorate), Zn(CHN)(HO), exhibits a slightly distorted square-pyramidal coordination environment with a water mol-ecule in the apical position. In the crystal, the macrocyclic ring alternates between two conformations with equal occupancies. Two of the three perchlorate anions are situated about a twofold rotation axis, and one of them shows disorder of the O atoms with occupancies of 0.62 (7) and 0.38 (7). In the crystal, the complexes are connected by inter-molecular hydrogen bonding the perchlorate anions.