Accession Number : AD0678978

Title :   INFLUENCE DES EFFETS INDUCTIFS ET STERIQUES SUR LA BASICITE DES AMINES TERTIAIRES. DETERMINATION ET INTERPRETATION DES DELTA H ET DES DELTA S (INFLUENCE OF THE INDUCTIVE AND STERIC EFFECTS ON THE BASICITY OF TERTIARY AMINES. DETERMINATION AND INTERPRETATION OF DELTA H AND THE DELTA S.),

Corporate Author : CANADIAN ARMAMENT RESEARCH AND DEVELOPMENT ESTABLISHMENT QUEBEC

Personal Author(s) : Perrault,G.

Report Date : 26 DEC 1967

Pagination or Media Count : 6

Abstract : Delta H and delta S were obtained by pK(a) measurements in water at different temperatures for a series of dihydroxylated tertiary amines. The thermodynamic factors seem to confirm that the diminution in basicity introduced by long chain substituents is caused by frontal hindrance to solvation, accompanied by a new type of back-strain. With short chain substituents, the formation of intramolecular hydrogen bonds can be seen by the variations of the entropy factor. (Author)

Descriptors :   (*AMINES, *THERMOCHEMISTRY), (*MOLECULAR ASSOCIATION, AMINES), ENTROPY, ENTHALPY, BASES(CHEMISTRY), WATER, CANADA

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE