2-Dicyanomethylene-1,3-Dithiole-4,5- Dithlolate-A New Dithiolene Ligand and Its Metal Complexes
作者:Rudolf Gompper、Jan-Gerd Hansel、Joachim Hock、Kurt Polborn、Elmar Dormann、Hubert Winter
DOI:10.1080/10587259508031835
日期:1995.11
2-Dicyanomethylene-1,3-dithiole-4,5-dithiolate (DCDD) has been prepared and used for the synthesis of transition metal complexes (Bu(4)N)(2)[M(DCDD)(2)], M = Ni, Cu, Zn. The redox properties of the nickel complex are similar to that of (Bu(4)N)(2)[Nj(dmit)(2)] (dmit: 1,3-dithiole-2-thione-4,5 dithiolate). Oxidation of (Bu(4)N)(2)[Ni(DCDD)(2)] yields the monoanionic complex Bu(4)N[Ni(DCDD)(2)] the electron spectrum of which is characterized by a strong NIR absorption at 1135 nm. The crystal structure of Bu(4)N[Ni(DCDD)(2)] shows the anion to be almost planar. Face-to-face stacking of the anions with alternating Ni-Ni distances results in a columnar structure of dimeric anions. The spins of the anions within a dimer are antiferromagnetically coupled. The complex Fc*[Ni(DCDD)(2)] (Fc*: decamethylferrocene) has been prepared by a metathesis reaction using Fc*BF4.