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Vol. 27 No. 12 (2015): Vol 27 Issue 12

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Co(II), Ni(II), Pd(II), Pt(IV), Cu(II) and UO2(II)-Ethanethiohydrazide Derivative Complexes: Synthesis, Spectral, Thermal and Computational Study

https://doi.org/10.14233/ajchem.2015.19273
Khlood Saad Abou-Melha
Chemistry Department, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia

Corresponding Author(s) : Khlood Saad Abou-Melha

dr.khlood@hotmail.com

Asian Journal of Chemistry, Vol. 27 No. 12 (2015): Vol 27 Issue 12

Abstract

A new series of metal ion complexes were synthesized using a SNSN donor ligand. The prepared complexes were characterized by FTIR, ESR, XRD, TG/DTA and SEM. The IR and 1H NMR spectra of the ligand show the presence of its tautomeric forms (thione-thiol). The ligand forms were contributed at Pd(II), Co(II), Ni(II) and Cu(II) complexes as a neutral tetradentate coordinator towards two central nucleus. While, in case of Pt(IV) and UO2(II) complexes, the ligand contributes as bi-negative tetradentate. The proposed geometries are in-between six to four coordination number surround the central atoms. The geometries proposed refer to the electronic spectral data beside the magnetic measurements. The XRD patterns reflect the nano-crystalline structures for the ligand, Pd(II), UO2(II) and Ni(II) compounds but the others are in amorphous in nature. The SEM images show undefined shapes except the needles ligand and granules Cu(II) complex shapes. EPR spectrum of Cu(II) complex is verifying the square-planar geometry of the complex through the calculating the spin Hamiltonian parameters. The TG and DTG curves displaying the lower thermal stability as a general trend. The molecular modeling was performed to assign the structural formula proposed for the ligand and its relative complexes.

Keywords

Thiohydrazide complexes X-ray diffractions Molecular modeling EPR spectra
Saad Abou-Melha, K. (2015). Co(II), Ni(II), Pd(II), Pt(IV), Cu(II) and UO2(II)-Ethanethiohydrazide Derivative Complexes: Synthesis, Spectral, Thermal and Computational Study. Asian Journal of Chemistry, 27(12), 4625–4633. https://doi.org/10.14233/ajchem.2015.19273
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