Discrete water clusters in tetra-μ-cyanido-tetracyanidobis(1,4,7-triisopropyl-1,4,7-triazacyclononane)dicopper(II)dinickel(II) tetrahydrate

Abstract

The title tetracyanidonickelate–copper complex, [Cu2Ni2(CN)8(C15H33N3)2]·4H2O, 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...O and O—H...N hydrogen-bond donor and acceptor.