Nickel(II) NHC-complexes with tridentate, dianionic ligands

A family of square planar nickel(II) complexes containing N-heterocyclic carbene ligands as well as tridentate, dianionic ligands was prepared by two different methods. The compounds were characterised by various spectroscopic methods and the solid-state structures were determined by single-crystal X-ray diffraction. Electrochemical studies of the compounds are also reported.