Standard thermodynamic parameters (logK°, ?rH°, T?rS°) of complexing 18crown6 ether (18C6) with D,Lalanine (Ala) in mixed water-dimethysulfoxide (H2O-DMSO) solvents are calculated on the basis of calorimetric titration results. A rise in the DMSO concentration in mixed solvent is found to increase stability and increase the exothermicity of the formation of [Ala-18C6] molecular complex. Changes in the reaction energetic are shown to be determined by changes in the solvation state of 18C6 that is the characteristic of the reactions of molecular complex formation between 18C6 and D,Lalanine or glycine in water-organic solvents.
Influence of the composition of aqueous dimethylsulfoxide solvent on thermodynamics of complexing between 18-crown-6-ether and D,L-alanine
Matteoli E
2012
Abstract
Standard thermodynamic parameters (logK°, ?rH°, T?rS°) of complexing 18crown6 ether (18C6) with D,Lalanine (Ala) in mixed water-dimethysulfoxide (H2O-DMSO) solvents are calculated on the basis of calorimetric titration results. A rise in the DMSO concentration in mixed solvent is found to increase stability and increase the exothermicity of the formation of [Ala-18C6] molecular complex. Changes in the reaction energetic are shown to be determined by changes in the solvation state of 18C6 that is the characteristic of the reactions of molecular complex formation between 18C6 and D,Lalanine or glycine in water-organic solvents.| File | Dimensione | Formato | |
|---|---|---|---|
|
prod_192447-doc_41491.pdf
non disponibili
Descrizione: Influence of the Composition of Aqueous Dimethylsulfoxide Solvent on Thermodynamics of Complexing between 18
Dimensione
175.52 kB
Formato
Adobe PDF
|
175.52 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
