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pubmed-article:11767830pubmed:issue12lld:pubmed
pubmed-article:11767830pubmed:dateCreated2001-12-20lld:pubmed
pubmed-article:11767830pubmed:abstractTextThe dissociation constants of 4-(4-chlorophenylazo)-3-methyl-1-[2-hydroxy-3-morphilinopropane-1-yl]-2-pyrazolin-5-one (CAMP) has been determined potentiometrically in 0.1 M KCl and 40% (v/v) ethanol-water mixture. The stepwise stability constants of the formed complexes of Mn2+, Co2+, Ni2+, Cu2+, Zn2+, La3+, Ce3+ and UO(2)2+, with CAMP have been determined. The stability of the formed complexes were found as follows: UO(2)2+ > Ce3+ > La3+ > Mn2+ < Co2+ < Ni2+ < Cu+ > Zn2+. The thermodynamic parameters (deltaG, deltaH and deltaS) for CAMP and its complexes were evaluated and discussed. The dissociation process is non-spontaneous, endothermic and entropically unfavourable. The formation of the complexes have been found to be spontaneous, exothermic or endothermic (depending on the metal) and entropically favourable. The stoichiometries of these complexes were determined spectrophotometrically and conductometrically and indicated the formation of 1:1 and 1:2 (metal:ligand) complexes.lld:pubmed
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pubmed-article:11767830pubmed:dateRevised2004-11-17lld:pubmed
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pubmed-article:11767830pubmed:articleTitleThermodynamics of substituted pyrazolone IX: potentiometric, spectrophotometric and conductometeric studies of 4-(4-chlorophenylazo)-3-methyl-1-[2-hydroxy-3-morphilinopropane 1-yl]-2-pyrazolin-5-one and its metal complexes.lld:pubmed
pubmed-article:11767830pubmed:affiliationChemistry Department, Faculty of Science (Demiatta), Mansoura University, Egypt.lld:pubmed
pubmed-article:11767830pubmed:publicationTypeJournal Articlelld:pubmed