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Conductometric studies of the thermodynamics for complexation of 1,1-diethyl-3-(4-methoxybenzoyl)thiourea and cobalt(II) cation in aqueous binary mixtures of polar organic solvents

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dc.FundingDetailsUniversiti Kebangsaan Malaysia,�UKM: DIP-2012-11 Universiti Kebangsaan Malaysia,�UKM: DLP-2013-001 Universiti Kebangsaan Malaysia,�UKM: DPP-2013-043 Universiti Kebangsaan Malaysia,�UKM: DPP-2014-048 Universiti Kebangsaan Malaysia,�UKM: FRGS/1/2014/ST01/UKM/02/2
dc.citedby4
dc.contributor.affiliationsFaculty of Science and Technology
dc.contributor.affiliationsUniversitas Syiah Kuala
dc.contributor.affiliationsUniversiti Kebangsaan Malaysia (UKM)
dc.contributor.affiliationsUniversiti Sains Islam Malaysia (USIM)
dc.contributor.authorSuhud K.en_US
dc.contributor.authorHeng L.Y.en_US
dc.contributor.authorRezayi M.en_US
dc.contributor.authorAl-Abbasi A.A.en_US
dc.contributor.authorHasbullah S.A.en_US
dc.contributor.authorAhmad M.en_US
dc.contributor.authorKassim M.B.en_US
dc.date.accessioned2024-05-28T08:27:49Z
dc.date.available2024-05-28T08:27:49Z
dc.date.issued2015
dc.description.abstractThe complexation reaction of Co2+ (M) and the 1,1-diethyl-3-(4-methoxybenzoyl)thiourea (L) ligand in the binary mixtures: acetonitrile-dimethylsulfoxide (MeCN-DMSO), acetonitrile-dichloromethane (MeCN-DCM), water-dimethylsulfoxide (H2O-DMSO) and acetonitrile-water (MeCN-H2O), was investigated using a conductometric method at temperatures of (288.15, 298.15, 308.15 and 318.15) K. In all cases, the conductance data showed that the stoichiometry of the neutral complex formed between M and L is 1:3 [M:3L], which indicates that the Co2+ ion was oxidized to Co3+ during the reaction. The best estimate of the stability constant, log10 K f, = 3.31 for the [CoL3] complex, was observed with the MeCN-DCM (20:80 %) binary mixture at 298.15 K. The values of the thermodynamic parameters (i.e., ?Gc� and ? Sc�) for the formation of the [CoL3] complex were obtained from the temperature dependence of the stability constant via van't Hoff plots. The results show that, in most cases, the [CoL3] complexes are enthalpy destabilized but entropy stabilized. The values and signs of the thermodynamic parameters are affected by the nature and composition of the mixed solvents but are independent of the temperature. � 2015 Springer Science+Business Media New York.
dc.description.natureFinalen_US
dc.identifier.CODENJSLCA
dc.identifier.doi10.1007/s10953-015-0308-2
dc.identifier.epage192
dc.identifier.issn959782
dc.identifier.issue2
dc.identifier.scopus2-s2.0-84925489456
dc.identifier.spage181
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84925489456&doi=10.1007%2fs10953-015-0308-2&partnerID=40&md5=ccb6e8e5c146b210f0ec93b43741d02f
dc.identifier.urihttps://oarep.usim.edu.my/handle/123456789/8820
dc.identifier.volume44
dc.languageEnglish
dc.language.isoen_US
dc.publisherSpringer New York LLCen_US
dc.relation.ispartofJournal of Solution Chemistry
dc.sourceScopus
dc.subjectBenzoylthioureaen_US
dc.subjectBinary solvent mixtureen_US
dc.subjectCobalt(II)en_US
dc.subjectConductometryen_US
dc.subjectThermodynamicsen_US
dc.subjectvan't Hoffen_US
dc.titleConductometric studies of the thermodynamics for complexation of 1,1-diethyl-3-(4-methoxybenzoyl)thiourea and cobalt(II) cation in aqueous binary mixtures of polar organic solvents
dc.typeArticleen_US
dspace.entity.typePublication

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