Structural and spectral investigations on some new Ni(II) complexes of di-2-pyridyl ketone N(4)-phenylthiosemicarbazone

Ni(II) complexes (1–5) of di-2-pyridyl ketone N(4)-phenylthiosemicarbazone (HL) have been synthesized and spectrochemically characterized. Elemental analyses revealed a NiL2 · 2H2O stoichiometry for compound 1. However, the single crystals isolated revealed a composition NiL2 · 0.5(H2O)0.5(DMF). The compound crystallizes into a monoclinic lattice with the space group P21/n. Complexes 2, 3 and 4 are observed to show a 1:1:1 ratio of metal:thiosemicarbazone:gegenion, with the general formula NiLX · yH2O [X = NCS, y = 2 for 2; X = Cl, y = 3 for 3 and X = N3, y = 4.5 for 4]. Compound 5 is a dimer with a metal:thiosemicarbazone:gegenion ratio of 2:2:1, with the formula [Ni2L2(SO4)] · 4H2O.

Ni(II) complexes (1–5) of di-2-pyridyl ketone N(4)-phenylthiosemicarbazone, HL have been synthesized spectrochemically characterized. The elemental analyses revealed a NiL2 · 2H2O stoichiometry for the compound 1. However, the single crystals isolated revealed a composition NiL2 · 0.5(H2O)0.5(DMF). The compound crystallizes into a monoclinic lattice with space group P21/n.Figure optionsDownload as PowerPoint slide