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Synthesis, characterization, crystal structure and electrochemical behavior of a nickel (II) complex of 5, 6-dihydro-2H-pyran-3-aldehyde thiosemicarbazone

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Synthesis,

characterization,

crystal

structure

and

electrochemical behavior of a nickel (II) complex of 5,

6-dihydro-2H-pyran-3-aldehyde thiosemicarbazone

Authors

Yahia Harek, Lahcène Larabi, Leila Boukli, Fatima Kadri, Noureddine Benali-Cherif, Mohsen M Mostafa

Publication date

2005/3/1

Journal

Transition Metal Chemistry

Volume 30 Issue 2 Pages 121-127 Publisher

Kluwer Academic Publishers

Description

A new NiII complex of 5,6-dihydro-2H-pyran-3-aldehyde thiosemicarbazone (HDPTSC) has

been synthesized and characterized by microanalyses, magnetic susceptibility, molar

conductance measurements and by spectral methods (i.r., u.v.–vis., 1H-n.m.r.). The structure

of [Ni(DPTSC)2] · B DMF has been solved using X-ray diffraction and found to be highly

symmetrical with a trans -arrangement of the two bidentate ligands. The thiosemicarbazone coordinates as an anionic ligand via the thiosemicarbazone moiety’s azomethine nitrogen and thiolate sulfur [on loss of the N2 hydrogen]. The electrochemical behavior of the ligand and its

NiII complex, determined by cyclic voltammetry, shows that the redox process of the ligand

was highly irreversible, whereas the redox process of the NiII complex was observed as a one

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