cis -(Acetato-κ 2 O , O ′)(5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane-κ 4 N , N ′, N ′′, N ′′′)nickel(II) perchlorate monohydrate

The complete cation in the title hydrated molecular salt, [Ni(CH 3 CO 2 )(C 16 H 36 N 4 )]ClO 4 ·H 2 O, is generated by the application of crystallographic twofold symmetry; the perchlorate anion and water molecule are each disordered around a twofold axis. The Ni II atom exists within a cis -N 4 O 2 donor set based on a strongly distorted octahedron and defined by the four N atoms of the macrocyclic ligand and two O atoms of a symmetrically coordinating acetate ligand. In the crystal, hydrogen bonding (water–acetate/perchlorate O—H...O and amine–perchlorate N—H...O) leads to layers in the ab plane. The layers stack along the c axis, being connected by C—H...O(water) interactions. The crystal studied was found to be a non-merohedral twin; the minor component refined to 15.9 (6)%.