ISSN:
1573-1111
Keywords:
α-Cyclodextrin
;
aliphatic acids
;
aqueous solution
;
thermodynamic parameters
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Inclusion complexes are formed in aqueous solution between α-cyclodextrin and several straight-chain alkanedioic acids (ethanedioic, propanedioic, butanedioic, pentanedioic, hexanedioic, heptanedioic and octanedioic acids), several corresponding anions, several straight-chain alkenedioic acids (cis-butanedioic,trans-butanedioic andt,t-2,4-hexadienedioic acids) and several corresponding anions. Formation constants for these complexes were determined by measuring the effect of complexation on the pH of cyclohexaamylose/acid/base buffer equilibria. Enthalpies and entropies of complexation were calculated from the temperature dependences of the formation constants. The observed trends in the thermodynamic parameters lead to hypotheses about the structures of the complexes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01033307
Permalink