ISSN:
0030-4921
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
13C magnetic resonance spectra of six diastereomeric mixtures of quaternary ammonium salts were investigated. Assignment of the signals of the non-aromatic carbons and measurement of the non-equivalences allowed the determination of the ratio of isomers in the mixtures. A deshielding β effect and a shielding γ effect for the quaternisation were pointed out.
Notes:
Les spectres de 13C de six couples d'ammoniums quaternaires ont été étudiés. L'attribution des signaux des carbones non-aromatiques et la détermination des non-équivalences ont conduit au dosage des diastéréoisomères ainsi qu'à la mise en évidence d'un effect β déblindant et γ blindant lors de la quaternarisation.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1270070104
