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

Bis(O-ethyl dithio­carbonato-κ2 S,S′)bis­(pyridine-3-carbonitrile-κN 1)nickel(II)

The Ni2+ ion in the title complex, [Ni(C3H5OS2)2(C6H4N2)2], is in a strongly distorted octa­hedral coordination environment formed by an N2S4 donor set, with the Ni2+ ion located on a centre of inversion. In the crystal, weak C—H⋯S and C—H⋯N inter­actions are observed

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

Nickel(II) complexes of m-ethylphenylxanthate with nitrogen donors and their biological screening

A series of five adducts of m-ethylphenylxanthate of nickel(II) [(m-C2H5C6H4OCS2)2Ni] with nitrogen donors have been synthesized in 1:2 molar ratio by the reaction of aqueous solution of NiCl2.6H2O with aqueous solution of sodium salt of m-ethylphenylxanthate. These metal complexes are reacted with nitrogen donors to give donor stabilized complex, [(m-C2H5C6H4OCS2)2(L)2Ni] where, L= 2-, 3-, 4-ethylpyridine and 2-, 3-chloropyridine. The adducts have been characterized by elemental analysis, molar conductance and magnetic susceptibility measurements, IR, electronic, mass spectral studies, thermogravimetric analysis, powder X-ray diffraction, biological studies. The spectral studies have revealed the octahedral coordination of ligands around Ni(II) metal ion. The adducts are found to be paramagnetic and non-ionic in nature. Mass studies show the monomeric nature of the adducts. The complexes have depicted potential antifungal activity against Bipolaris maydis and Rhizoctonia solani. Some of the synthesized Ni(II) xanthate complexes display in vitro cytotoxic efficacy against human cancer cell lines

Nickel(II) complexes of m-ethylphenylxanthate with nitrogen donors and their biological screening

1618-1626A series of five adducts of m-ethylphenylxanthate of nickel(II) [(m-C2H5C6H4OCS2)2Ni] with nitrogen donors have been synthesized in 1:2 molar ratio by the reaction of aqueous solution of NiCl2.6H2O with aqueous solution of sodium salt of m-ethylphenylxanthate. These metal complexes are reacted with nitrogen donors to give donor stabilized complex, [(m-C2H5C6H4OCS2)2(L)2Ni] where, L= 2-, 3-, 4-ethylpyridine and 2-, 3-chloropyridine. The adducts have been characterized by elemental analysis, molar conductance and magnetic susceptibility measurements, IR, electronic, mass spectral studies, thermogravimetric analysis, powder X-ray diffraction, biological studies. The spectral studies have revealed the octahedral coordination of ligands around Ni(II) metal ion. The adducts are found to be paramagnetic and non-ionic in nature. Mass studies show the monomeric nature of the adducts. The complexes have depicted potential antifungal activity against Bipolaris maydis and Rhizoctonia solani. Some of the synthesized Ni(II) xanthate complexes display in vitro cytotoxic efficacy against human cancer cell lines

Synthesis and Characterization of the Adducts of Morpholinedithioccarbamate Complexes of Oxovanadium (IV), Nickel(II), and Copper(II) with Piperidine and Morpholine

A series of 1:1 adducts of bis(morpholinedithiocarbamato) complex of VO(IV), 1:1 and 1:2 adducts of bis(morpholinedithiocarbamato) complexes of Ni(II) and Cu(II) with piperidine and morpholine have been synthesized and characterized by elemental analysis, molar conductance, magnetic susceptibility, IR, UV-Vis, and TGA/DTA techniques. Analytical data reveals that VO(IV) complex forms only 1:1 adducts with the formula [VO(morphdtc)2L].H2O while Ni(II) and Cu(II) complexes form both 1:1 and 1:2 adducts with 1:1 adducts having general formula Ni(morphdtc)2.L and Cu(morphdtc)2.L and 1:2 adducts having general formula Ni(morphdtc)2.L2 and Cu(morphdtc)2.L2 (morphdtc = morpholinedithiocarbamate, L = morpholine and piperidine). Antifungal activity of some complexes has been carried out against the fungal strain Fusarium oxysporium. Thermal studies indicate a continuous weight loss. A square pyramidal geometry has been proposed for the 1:1 adducts of Ni(II) and Cu(II) complexes while an octahedral geometry has been proposed for the 1:1 adducts of VO(IV) and for the 1:2 adducts of Ni(II) and Cu(II) complexes

Crystal structure of bis(3-bromopyridine-κN)bis(O-ethyl dithiocarbonato-κ2S,S′)nickel(II)

In the title molecular complex, [Ni(C3H5OS2)2(C5H4BrN)2], the Ni2+ cation is located on a centre of inversion and has a distorted octahedral N2S4 environment defined by two chelating xanthate ligands and two monodentate pyridine ligands. The C—S bond lengths of the thiocarboxylate group are indicative of a delocalized bond and the O—Csp2 bond is considerably shorter than the O—Csp3 bond, consistent with a significant contribution of one resonance form of the xanthate anion that features a formal C=O+ unit and a negative charge on each of the S atoms. The packing of the molecules is stabilized by C—H...S and C—H...π interactions. In addition, π–π interactions between the pyridine rings [centroid-to-centroid distance = 3.797 (3) Å] are also present. In the crystal structure, molecules are arranged in rows along [100], forming layers parallel to (010) and (001)