REACTIONS OF BIS(ISOPROPYLXANTHATO)NICKEL(II) WITH N-DONOR LIGANDS

Complexes of Ni(II) with isopropylxanthate and Lewis bases as mixed N-ligands of composition [Ni(i-prxa)2(L)] and [Ni(i-prxa)2(L')2] have been prepared, where i-prxa = i-C3H7OCS2-, and L = ethylenediamine, 2,2'-bipyridine, 1,10-phenanthroline or 5-nitro-1,10-phenanthroline, and L' = beta-picoline or benzothiazole. On the basis of their chemical analyses, i.r. and electronic spectra, magnetic measurements, thermal analyses and molar conductivities, an octahedral structure is proposed. The crystal and molecular structures of [Ni(i-prxa)2(phen)] and [Ni(i-prxa)2(btz)2] were determined, showing on cis-octahedral and trans-octahedral coordination spheres, respectively, with an NiS4N2 chromophore.