Snthesis and Characterisation of the First Cyanodiselenoimidocarbonate [C₂N₂Se₂]²- Complexes

[Pt(C2N2Se2)(PR3)(2)] (PR3 = PMe2Ph, PPh3) and [Pt(C2N2Se2)(PP)] (PP = dppe, dppm, dppf) were obtained by the reaction of the appropriate metal halide containing complex with potassium cyanodiselenoimidocarbonate. The dimeric cyanodiselenoimidocarbonate complexes. [M{(C2N2Se2)(eta(5)-C5Me5)}(2)] (M = Rh Ir)] were synthesised from the appropriate transition metal dimer starting material. The cyanodiselenoimidocarbonate ligand is Se,Se-bidentate in the monomeric complexes - the terminal CN group is approximately coplanar with the CSe2 group, and the nitrogen atom is trigonal therefore reducing the planar symmetry of the ligands. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005).