| Abstract: | Abstract Nickel(II) complexes with a combination of trithiocyanuric acid and diamines or triamines of composition Ni(aepa)(ttcH)(H2O)], Ni(dien)(ttcH)(H2O)], Ni(dpta)(ttcH)(H2O)] H2O, Ni(phen)2(ttcH)]H2O, Ni(phen)3](ttcH)-5H2O and Ni(1,2-pn)3](ttcH)-H2O (aepa = N-(2-aminoethyl)-1,3-propanediamine,dien = diethylenetriamine,dpta = dipropylenetnamine, phen = 1,10-phenanthroline, 1,2-pn = 1,2-diaminopropane. ttcH3 = trithiocyanuric acid) have been prepared. The compounds have been characterized by means of elemental analysis, IR and electronic spectroscopies and magnetochemical measurements. Selected complexes were studied by thermal analysis. The compounds can be characterized as distorted octahedral Ni(II) complexes. It was found that the trithiocyanuric dianion can act either as a bidentate ligand or be situated out of the coordination sphere of nickel. The crystal and molecular structure of Ni(dpta)(ttcH)(H2O)] H2O was determined. Crystals are monoclinic, space group P21/n, with a = 20.316(4), b = 7.967(2), c = 21.401(4) Å, β = 99.23(3)°, K=3419.1(13)Å3, Z = 4, T = 293 K. The nickel(II) atom is six-coordinated by three nitrogen atoms from dipropylene-triamine, nitrogen and sulphur from trithiocyanuric acid, and an oxygen atom from a water molecule in a distorted octahedral geometry. |
