Premium
Etude thermodynamique des complexes de transfert de charge du type n‐σ* en solution Complexes de la quinoléine et de quinoléines substituées avec I 2 , ICI et IBr
Author(s) -
Biselx Charles,
Schaer JeanJacques,
Janjic Désimir
Publication year - 1978
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19780610230
Subject(s) - chemistry , enthalpy , adduct , equilibrium constant , standard enthalpy of formation , quinoline , iodine , stability constants of complexes , medicinal chemistry , thermodynamics , organic chemistry , aqueous solution , physics
Thermodynamic study of charge transfert complexes ( n ‐σ*) in solution Charge transfer complexes of quinoline and substituted quinolines (donors) with iodine, iodine chloride, and iodine bromide (acceptors) have been studied spectrophotometrically in CCl 4 . The 1:1 stoechiometry of these complexes was verified by means of the continous variations method and the appearance of isosbestic points. Simultaneous determination of the equilibrium constant and enthalpy of adduct formation was carried out by calorimetry. It was observed for every donor that the equilibrium constants of the complexes studied increase with the strength of the acceptors. A linear correlation between enthalpy of adduct formation and donor strength was obtained only for the complexes Donor ICI.