Synthesis, characterization and electrochemical property of dicyclohexyl-18-crown-6 nickel(II) bis(dithiolate) complexes

Two organic-inorganic hybrid dicyclohexyl-18-crown-6 nickel(II) bis(dithiolate) complexes, [K(DC18C6-B)](2)[Ni(mnt)(2)] (1) and [K(DC18C6-A)](2)[Ni(i-mnt)(2)] (2) (DC18C6-A = cis-syn-cis-dicyclohexyl-18-crown-6; DC18C6-13 = cis-anti-cis-dicyclohexyl -18-crown-6; mnt = maleonitriledithiolate; i-mnt = isomaleonitriledithiolate), have been synthesized by the reactions of dicyclohexyl-18-crown-6 with NiCl2 and K-2(mnt) or K2(i-mnt) respectively, and characterized by elemental analysis, FT-IR, UV-Vis spectroscopy and X-ray single crystal diffraction. They both crystallize triclinic, space group P (1) over bar. Complex 1 shows a neutral molecule composed. of two [K(DC18C6-B)](+) complex cations and one [Ni(mnt)(2)](2-) complex anion via two K-N coordination bonds. In complex 2, the [K(DC18C6-A)](+) complex cation and [Ni(i-mnt)(2)](2-) complex anion afford a 1D chain-like structure by N-K-N interactions.