Tris-, bis- and mono-ligand complexes of Ni-II with 1-phenyl-4,6-dimethylpyrimidine-2-thione (L) having the general formulae NiL(3)X(2) . 2H(2)O (X=ClO4-, BF4-), NiL(2)X(2) (X = Cl-, Br-, SCN- or NO3-), NiL(2)X(2) . EtOAc (X = Br- or I-), NiL(2)X(2) . H2O . EtOH (X = I- or NO3-) and NiLCl(2) . 3H(2)O, were synthesized and their structures deduced from i.r. and electronic spectra, and magnetic properties. The combined evidence is consistent with an octahedral coordination for the Ni-II ion in all the complexes, with the ligand acting as a bidentate N,S-chelating agent. Spectral evidence, conductivity data and electrochemical results in DMF solution show that the complexes undergo solvolysis readily. Polarographic and c.v. data for the [NiL(3)](ClO4)(2) . 2H(2)O complex and for the [Ni(DMF)(6)](ClO4)(2)-L systems, at increasing ligand concentrations, have shown that in DMF solution the [Ni(DMF)(6)](2+) cation prevails and that the thiopyrimidine-containing species, [NiL(DMF)(5)](2+) (L = N-monodentate ligand) (beta = 2.42 x 10(6)), can be formed only in the presence of a large excess of free ligand.

Synthesis, Spectroscopic, Magnetic, Conductometric and Electrochemical Investigation of Nickel (II)-1-phenyl-4,6-dimethylpyrimidine-2-thione Complexes / Battistuzzi, Gianantonio; Borsari, Marco; D., Dallari; Battistuzzi, Raffaele. - In: TRANSITION METAL CHEMISTRY. - ISSN 0340-4285. - STAMPA. - 20:(1995), pp. 212-219.

Synthesis, Spectroscopic, Magnetic, Conductometric and Electrochemical Investigation of Nickel (II)-1-phenyl-4,6-dimethylpyrimidine-2-thione Complexes

BATTISTUZZI, Gianantonio;BORSARI, Marco;BATTISTUZZI, Raffaele
1995

Abstract

Tris-, bis- and mono-ligand complexes of Ni-II with 1-phenyl-4,6-dimethylpyrimidine-2-thione (L) having the general formulae NiL(3)X(2) . 2H(2)O (X=ClO4-, BF4-), NiL(2)X(2) (X = Cl-, Br-, SCN- or NO3-), NiL(2)X(2) . EtOAc (X = Br- or I-), NiL(2)X(2) . H2O . EtOH (X = I- or NO3-) and NiLCl(2) . 3H(2)O, were synthesized and their structures deduced from i.r. and electronic spectra, and magnetic properties. The combined evidence is consistent with an octahedral coordination for the Ni-II ion in all the complexes, with the ligand acting as a bidentate N,S-chelating agent. Spectral evidence, conductivity data and electrochemical results in DMF solution show that the complexes undergo solvolysis readily. Polarographic and c.v. data for the [NiL(3)](ClO4)(2) . 2H(2)O complex and for the [Ni(DMF)(6)](ClO4)(2)-L systems, at increasing ligand concentrations, have shown that in DMF solution the [Ni(DMF)(6)](2+) cation prevails and that the thiopyrimidine-containing species, [NiL(DMF)(5)](2+) (L = N-monodentate ligand) (beta = 2.42 x 10(6)), can be formed only in the presence of a large excess of free ligand.
1995
20
212
219
Synthesis, Spectroscopic, Magnetic, Conductometric and Electrochemical Investigation of Nickel (II)-1-phenyl-4,6-dimethylpyrimidine-2-thione Complexes / Battistuzzi, Gianantonio; Borsari, Marco; D., Dallari; Battistuzzi, Raffaele. - In: TRANSITION METAL CHEMISTRY. - ISSN 0340-4285. - STAMPA. - 20:(1995), pp. 212-219.
Battistuzzi, Gianantonio; Borsari, Marco; D., Dallari; Battistuzzi, Raffaele
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/592103
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