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THE THERMODYNAMIC parameter of complexes of UO2(II)and ……Th(IV) cations with ortho substituted of some phenyl hydrazo compounds of di-bnzoyl methane or acetoacetanilide was studied. The ortho-substitution involves carboxy or phenolic or thiol groups. The potentiometric titrations were carried out in 75% (v/v) methanol-water and 0.10 M KNO3. The thermodynamic parameters have been divided into electrostatic (el.) and non-electrostatic (non), which give some light upon the nature of the coordination between metal ions and ligands. Comparison of the experimental and calculated (using modified Born equation) values of ΔG indicates the inner sphere nature of all the complex systems. Spectrophotometric studies were carried out between UO2(II) and o-hydroxy phenyl hydrazo acetoacetanilide. Also, conduct metric titration for both UO2(II) and Th(IV) with o-carboxy phenyl-hdrazo acetoacetanilide to confirm the stoichiometric structures of formed complexes was calculated. The solid complexes were isolated and characterized by elemental analysis, infrared and TG, DTG and DTA measurements. The results show that the ligands behave towards the metal ion as dibasic tridentate ligands.
DOI
10.21608/ejchem.2012.1152
Keywords
Azo-β-diketone complexes, Potentiometric titration, Thermodynamic parameter, TG, DTG and DTA and Solid complexes
Link
https://ejchem.journals.ekb.eg/article_1152.html
Detail API
https://ejchem.journals.ekb.eg/service?article_code=1152
Publication Title
Egyptian Journal of Chemistry
Publication Link
https://ejchem.journals.ekb.eg/
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