CHIRAL DISCRIMINATION IN THE LIQUID-PHASE - EXCESS VOLUMES OF BINARY-MIXTURES OF AMINO-ACID DERIVATIVES

Authors
LEPORI L KOPPENHOEFER B
Citation
L. Lepori et B. Koppenhoefer, CHIRAL DISCRIMINATION IN THE LIQUID-PHASE - EXCESS VOLUMES OF BINARY-MIXTURES OF AMINO-ACID DERIVATIVES, Journal of physical chemistry, 98(27), 1994, pp. 6862-6864
Citations number
22
Categorie Soggetti
Chemistry Physical
Journal title
Journal of physical chemistry → ACNP
ISSN journal
00223654
Volume
98
Issue
27
Year of publication
1994
Pages
6862 - 6864
Database
ISI
SICI code
0022-3654(1994)98:27<6862:CDITL->2.0.ZU;2-R
Abstract
Volume changes on mixing the enantiomers of N-trifluoroacetylamino aci d methyl esters (N-TFA-amino acid-OMe) were determined at 25 degrees C by means of a high-precision vibrating-tube densimeter. The excess mo lar volumes (V-E) for the racemic mixtures of N-TFA-Ala-OMe 1, N-TFA-V al-OMe 2, and N-TFA-Leu-OMe 3, were found as V-E = 0.0098, -0.0458, an d 0.035 cm(3) mol(-1), respectively. For 2 and 3, these volumetric eff ects of discriminating interactions between enantiomers in the liquid phase are the largest ever observed.