Fünffach koordinierte Co(III)-Komplexe [Tripod-Cobalt-(ortho(X)(Y)C6H4)]+ mit ortho-phenylenverbrückten Chelatliganden [(XH)(YH)C6H4] (XH, YH = NH2, OH, SH) / Five-Coordinate Co(III) Complexes [Tripod-Cobalt-(ortho-(X)(Y)C6H4)]+ Containing ortho-Phenylene

The ortho-phenylene compounds ortho-[(XH)(YH)C6H4] (XH, YH = NH2, SH, OH) react with Co(BF4)2•6H2O and Tripod (CH3C(CH2PPh2)3) to give the five-coordinate Co(III) complexes [Tripod-Cobalt-(ortho-(X)(Y)C6H4)]+ (X, Y = NH, O, S), 1-6. The structures of 1—6 have been characterized by X-ray analyses of appropriate salts. The compounds have further been characterized by IR, NMR, UV-VIS and cyclovoltammetric measurements. As a compound analogous to 1—6, but containing the saturated chelate ligand [(S)C2H4(S)]2- instead of the conjugated ortho-phenylene type ligands of 1-6, [Tripod-Cobalt-((S)C2H4(S))]+, 7, has been prepared and fully characterized. It is inferred that the coordination geometries of 1-7 do not strongly depend on conjugative interaction within the chelating ligands.