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Spectroscopic, thermal and electrochemical studies on some nickel(II) thiosemicarbazone complexes by R.M. El-Shazly; G.A.A. Al-Hazmi; S.E. Ghazy; M.S. El-Shahawi; A.A. El-Asmy is a Chemistry article available to read on EtoBox.

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Several complexes of thiosemicarbazone derivatives with Ni(II) have been prepared. Structural investigation of the ligands and their complexes has been made based on elemental analysis, magnetic moment, spectral (UV-Vis, i.r., (1)H NMR, ms), and thermal studies. The i.r. spectra suggest the bidentate mononegative and tridentate (neutral, mono-, and binegative) behavior of the ligands. Different stereochemistries were suggested for the isolated complexes. The thermogravimetry (TG) and derivative thermogravimetry (DTG) have been used to study the thermal decomposition and kinetic parameters of some ligands and complexes using the Coats-Redfern and Horowitz-Metzger equations. The redox properties and stability of the complexes toward oxidation waves explored by cyclic voltammetry are related to the electron withdrawing or releasing ability of the substituent of thiosemicarbazone moiety. The samples displayed Ni(II)/Ni(I) couples irreversible waves associated with Ni(III)/Ni(II) process.

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Author

R.M. El-Shazly; G.A.A. Al-Hazmi; S.E. Ghazy; M.S. El-Shahawi; A.A. El-Asmy

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Pergamon Press Ltd.; Elsevier BV (ISSN 1386-1425)

Published

2005

Language

EN

Field

Chemistry (Physical Sciences)