Synthesis, Structure and Characterization of Adducts of O-Propyldithiocarbonates with Substituted Pyridines

Abstract: A series of six coordinated Ni(II)complexes with general formula [Ni(C 5 H 4 NCl) 2 (S 2 COC 3 H 7 ) 2 ] was synthesized and characterized. All the complexes have 1:2 stoichiometry, are non ionic and paramagnetic in nature. TGA-DTA studies show the formation of NiS as the stable end product of the decomposition. One of the adducts bis(O-propyldithiocarbonato)bis (3-chloropyridine) nickel(II) crystallizes in the monoclinic space group P21/c. The Ni 2+ ion is in an octahedral coordination environment formed by an N 2 S 4 donor set, defined by two chelating dithiocarbonate anions as well as two 3-chloropyridine ligands with the Ni 2+ ion located at the inversion centre. The packing of layers of molecules is stabilized by weak π -π and C-H···π interactions. The asymmetric unit comprises of half molecule and Nickel(II) cation lies on an inversion centre

Synthesis, Characterization and Biological Application of Adducts of Bis(S-ethyltrithiocarbonato)nickel(II) with Heterocyclic Amines

Abstract: Eleven new adducts of bis(S-ethyltrithiocarbonato)nickel(II) with heterocyclic amines have been described. Structural features of adducts isolated in the solid state are established by several techniques using elemental analysis, molar conductance, magnetic measurements, TGA-DTA and spectroscopic studies which include FTIR, UV-Vis, mass. These studies suggest that adducts have the general formula [Ni(S 2 CSC 2 H 5 ) 2 L 2 ] where L = cyano-, amino-, chloro-, ethylpyridine. Antifungal activities of these adducts have been carried out against the fungal strain Sclerotium rolfsii and Fusarium oxysporium and some of these adducts showed noticeable activity against the fungus. Various studies support the distorted octahedral geometry around Ni(II) ion