REACTIONS OF BIS(ISOPROPYLXANTHATO)NICKEL(II) WITH NITROGEN-DONOR LIGANDS .2.

New complexes of bivalent nickel with isopropylxanthates and nitrogen- donor ligands of composition [Ni(Pr(i)xa)(2)(L)], [Ni(Pr(i)xa)(2)(L(1) )(2)], [Ni(L(2))(2)](Pr(i)xa)(2), and [Ni(L(3))(3)] (Pr(i)xa)(2) have been synthesized, where Pr(i)xa = i-C3H7OCS2-, L = 1,2-diaminopropane (1,2-pn), N,N,N',N'-tetramethylethylenediamine (tmen) or 4,4'-bipyridi ne (4,4'-bipy), L(1) = pyridine (py), L(2) = diethylenetriamine (dien) and L(3) = ethylenediamine (en), 1,2-diaminopropane or 1,10-phenanthr oline (phen). The compounds have been characterized by elemental analy sis, IR and UV-vis spectroscopy, magnetochemical measurements, molar c onductivity and thermal analysis. The compounds containing the complex cation have been one-electron irreversibly oxidized using cyclic volt ammetry. The crystal and molecular structures of [Ni(Pr(i)xa)(2)(tmen) ] and [Ni(phen)(3)](Pr(i)xa)(2) have been elucidated.