Ubergangsmetallkomplexe mit schwefel-liganden, cv* ni(ii)- und ni(iii)-komplexe mit dem funfzahnigen thioether- thiolat-amin-liganden 'nmes4'2-('nmes4'2- = dianion von 2,2'-bis(2-mercaptophenylthio)diethylmethylamin) / Transition metal complexes with sulfur ligands, cv* ni(ii) and ni(iii) complexes with the pentadentate thioether- thiolate-amine-ligand 'nmes4'2- ('nmes4'2- = dianion of 2.2'-bis(2-mercaptophenylthio)diethylmethylamine)