Search results for "Complexones"

showing 2 items of 2 documents

Sequestration of alkyltin(IV) cations by complexation with amino-polycarboxylic chelating agents

2013

Abstract The binding capacity of four amino-polycarboxylic ligands (APCs) [nitrilotriacetate (NTA), ethylenediamine- N , N , N′ , N′ -tetraacetate (EDTA), (S,S)-ethylenediamine- N , N ′-disuccinic acid (S,S-EDDS) and diethylenetriamine- N , N , N′ , N″ , N″ -pentaacetate (DTPA)] towards mono-, di- and tri-alkyltin(IV) cations [(CH 3 )Sn 3 + , (CH 3 ) 2 Sn 2 + , (C 2 H 5 ) 2 Sn 2 + , (CH 3 ) 3 Sn + or (C 2 H 5 ) 3 Sn + ] was studied, in aqueous solutions, by ISE-H + potentiometry, at I  = 0.1 mol L − 1 (NaCl) and at T  = 298.15 K. In all the systems R x Sn (4 − x)+  − APC (R = CH 3 or C 2 H 5 ) a strong 1:1 species is formed together with protonated, hydroxo and dinuclear complexes. The valu…

Aqueous solutionComplexation in aqueous solutionStereochemistryLigandEthylenediamineProtonationAlkyltin(IV) cations; Amino-polycarboxylic ligands; Complexation in aqueous solution; Sequestration ability of complexones;Condensed Matter PhysicsMedicinal chemistryAtomic and Molecular Physics and OpticsAlkyltin(IV) cationElectronic Optical and Magnetic MaterialsIonAmino-polycarboxylic ligandchemistry.chemical_compoundSequestration ability of complexoneschemistryDiethylenetriamineMaterials ChemistryChelationSettore CHIM/01 - Chimica AnaliticaPhysical and Theoretical ChemistrySimple correlationSpectroscopy
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Sequestration of (CH3)Hg+ by amino‐polycarboxylic chelating agents

2012

Abstract The speciation of mono-methylmercury(II) cation (MeHg+) in the presence of Nitrilotriacetate (NTA), Ethylenediamine-N,N,N′,N′-tetraacetate (EDTA), diethylenetriamine-N,N,N′,N″,N″-pentaacetate (DTPA) and (S,S)- Ethylenediamine-N,N′-disuccinic acid (S,S-EDDS) was investigated at I = 0.1 mol L− 1 (NaCl) with the aim to assess a trend of sequestering capacity of the amino‐polycarboxylic (APCs) ligand class towards this cation in aqueous solution. The results obtained gave evidence for the formation of a mononuclear [MeHg(APC)] complex species, differently protonated MeHg(HiL) species (i = 1 to 3, depending on the APC considered), a mixed hydroxo species [MeHg(APC)(OH)] and a binuclear …

Sequestering abilitymedia_common.quotation_subjectInorganic chemistryMethylmercury(II) Complexones Equilibrium analysis Sequestering ability Speciation studiesProtonationMedicinal chemistryComplexoneMaterials ChemistryChelationSettore CHIM/01 - Chimica AnaliticaPhysical and Theoretical ChemistrySpeciation studiesSpectroscopymedia_commonContaminated soilsAqueous solutionChemistryLigandEquilibrium analysisSequestering AgentCondensed Matter PhysicsComplexonesAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsSpeciationMethylmercury(II)Ionic strengthEquilibrium analysi
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