A new series of coordination compounds C[Ni(dmid)~2] (where C is outer cations, H~2dmid=1,3-dithiole-2-one-4,5-dithiolate) have been prepared for the first time. The same compound [Ni(dmid)~2] is obtained when these compounds of C[Ni(dmid)~2] are oxidized. The components of these new compounds have been determined. IR, UV, ESR, XPS, cyclic voltammograms and conductivities at room temperature were studied. The XPS spectra show that the electron transfer occurs mainly on the ligand during the oxidation. Thus, charge distribution of the ligand changed accordingly.

Key words: NICKEL COMPLEX, CHARGE DISTRIBUTION, OXIDATION, INFRARED SPECTROPHOTOMETRY, ULTRAVIOLET SPECTROPHOTOMETRY, ELECTRON SPIN RESONANCE, X-RAY PHOTOELECTRON SPECTROMETRY