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Anion complexation by calix[3]thieno[1]pyrrole: the medium effect.

Danil de Namor, AF, Abbas, I and Hammud, HH (2006) Anion complexation by calix[3]thieno[1]pyrrole: the medium effect. J Phys Chem B, 110 (5). pp. 2142-2149.

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The interaction of calix[3]thieno[1]pyrrole, 1, and halide and dihydrogen phosphate anions in a variety of solvents (acetonitrile, propylene carbonate, N,N-dimethylformamide, and dimethyl sulfoxide) has been investigated through 1H NMR, conductance measurements, and titration calorimetry. 1H NMR measurements reveal the sites of interaction of the ligand with the anions in CD3CN while the composition of the complex was determined through conductance measurements. A quantitative assessment of anion-ligand interactions is provided. Thus the thermodynamics of complexation of 1 with halide and dihydrogen phosphate anions in dipolar aprotic media at 298.15 K is reported. These data are interpreted in terms of the thermodynamics of transfer of reactants and product from a reference solvent (acetonitrile) to other solvents. The crucial role played by the solvent on the ability of the ligand to interact with anions and on the composition of the complex is demonstrated.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Danil de Namor,
Abbas, I
Hammud, HH
Date : 9 February 2006
DOI : 10.1021/jp056492p
Uncontrolled Keywords : Acetonitriles, Anions, Calixarenes, Conductometry, Dimethyl Sulfoxide, Dimethylformamide, Formamides, Hydrocarbons, Halogenated, Ligands, Magnetic Resonance Spectroscopy, Molecular Structure, Phosphates, Propane, Pyrroles, Solvents, Thermodynamics, Thiophenes
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:11
Last Modified : 24 Jan 2020 21:52

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