Discrete Water Clusters In Tetra-Mu-Cyanido-Tetracyanidobis(1,4,7-Triisopropyl-1,4,7-Triazacyclonon Ane)Dicopper(Ii) Dinickel(Ii) Tetrahydrate

The title tetracyanidonickelate-copper complex, [Cu2Ni2(CN)(8)(C15H33N3)(2)] center dot 4H(2)O, was synthesized by self-assembly using potassium tetracyanidonickelate(II) and dichlorido(1,4,7-triisopropyl-1,4,7-triazacyclononane) copper(II). The asymmetric unit contains half of a complex molecule and two water molecules. The entire complex has 1 symmetry and contains Ni(II) in a slightly distorted square-planar and Cu(II) in a square-pyramidal coordination environment. The crystal packing shows a discrete tetramer water cluster. Within the cluster, the four water molecules are fully coplanar and each water monomer acts both as single O-H center dot center dot center dot O and O-H center dot center dot center dot N hydrogen-bond donor and acceptor.