trans-(5,7,7,12,14,14-Hexamethyl-1,4,8,11-tetra­aza­cyclo­tetra­deca-4,11-diene-κ(4) N,N′,N′′,N′′′)bis­(nitrito-κN)cobalt(III) perchlorate hemihydrate

The asymmetric unit of the title Co(III) complex, [Co(NO(2))(2)(C(16)H(32)N(4))]ClO(4)·0.5H(2)O, comprises two complex cations, two perchlorate anions and a water mol­ecule of crystallization. The Co(III) atoms exist within distorted octa­hedral N(6) geometries defined by four N atoms of the macrocycle ligand and trans-N atoms derived from the nitrite anions. Systematic variations in the Co—N bond lengths are correlated with the presence of intra­molecular N—H⋯O(nitrite) hydrogen bonds. In the crystal, water-O—H⋯O(perchlorate) hydrogen bonds, involving one of the independent perchlorate anions only, lead to supra­molecular chains along the b-axis direction. The three-dimensional architecture is consolidated by numerous C—H⋯O inter­actions. The crystal studied was a non-merohedral, racemic twin.