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

A new Ni^sup II^ 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., ^sup 1^H-n.m.r.). The structure of [Ni(DPTSC)^sub 2^] · B...

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Bibliographic Details
Published in:Transition metal chemistry (Weinheim) 2005-03, Vol.30 (2), p.121-127
Main Authors: Harek, Yahia, Larabi, Lahc ne, Boukli, Leila, Kadri, Fatima, Benali-Cherif, Noureddine, Mostafa, Mohsen M.
Format: Article
Language:English
Subjects:
Crystal structure
Electrodes
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Summary:A new Ni^sup II^ 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., ^sup 1^H-n.m.r.). The structure of [Ni(DPTSC)^sub 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 Ni^sup II^ complex, determined by cyclic voltammetry, shows that the redox process of the ligand was highly irreversible, whereas the redox process of the Ni^sup II^ complex was observed as a one electron transfer process in a quasi-reversible and diffusion-controlled reaction.[PUBLICATION ABSTRACT]
ISSN:0340-4285
1572-901X
DOI:10.1007/s11243-004-1565-x