COORDINATION-COMPOUNDS OF NICKEL WITH TRITHIOCYANURIC ACID

Nickel(II) complexes with a combination of trithiocyanuric acid and di amines or triamines of composition [Ni(aepa)(ttcH)(H2O)], [Ni(dien)(tt cH)(H2O)], [Ni(dpta)(ttcH) (H2O)]. H2O, [Ni(phen)(2)(ttcH)]. H2O, [Ni( phen)(3)](ttcH). 5H(2)O and [Ni(1,2-pn)(3)](ttcH). H2O (aepa = N-(2-am inoethyl)-1,3-propanediamine,dien = diethylenetriamine,dpta = dipropyl enetriamine,phen = 1,10-phenanthroline, 1,2-pn = 1,2-diaminopropane, t tcH(3) = trithiocyanuric acid) have been prepared. The compounds have been characterized by means of elemental analysis, IR and electronic s pectroscopies and magnetochemical measurements. Selected complexes wer e studied by thermal analysis. The compounds can be characterized as d istorted octahedral Ni(II) complexes. It was found that the trithiocya nuric dianion can act either as a bidentate ligand or be situated out of the coordination sphere of nickel. The crystal and molecular struct ure of [Ni(dpta)(ttcH)(H2O)]. H2O was determined. Crystals are monocli nic, space group P2(1)/n, with a = 20.316(4), b = 7.967(2), c = 21.401 (4) Angstrom, beta = 99.23(3)degrees, V = 3419.1(13) Angstrom(3), Z = 4, T = 293 K. The nickel(II) atom is six-coordinated by three nitrogen atoms from dipropylenetriamine, nitrogen and sulphur from trithiocyan uric acid, and an oxygen atom from a water molecule in a distorted oct ahedral geometry.