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-Bridged Chelate Ligands [(XH)(YH)C₆H₄] (XH, YH = NH₂, OH, SH)

The ortho-phenylene compounds ortho-[(XH)(YH)C 6 H 4 ] (XH, YH = NH 2 , SH, OH) react with Co(BF 4 ) 2 •6H 2 O and Tripod (CH 3 C(CH 2 PPh 2 ) 3 ) to give the five-coordinate Co(III) complexes [Tripod-Cobalt-(ortho-(X)(Y)C 6 H 4 )] + (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)C 2 H 4 (S)] 2- instead of the conjugated ortho-phenylene type ligands of 1-6, [Tripod-Cobalt-((S)C 2 H 4 (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.