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Étude expérimentale de l'auto-association des molécules modèles dipeptidiques. II. Association stéréosélective des molécules énantiomères

✍ Scribed by Manh Thong Cung; Michel Marraud; Jean Neel

Publisher
Wiley (John Wiley & Sons)
Year
1976
Tongue
English
Weight
702 KB
Volume
15
Category
Article
ISSN
0006-3525

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✦ Synopsis

Modes of aggregation of alanine-, norvaline-and valine-containing dipeptides with the

have been studied in CC14 solution by using infrared and nuclear magnetic resonance spectroscopies. Solutions of the pure L isomer and of the racemic mixture do not give identical data. At a given concentration, the racemic mixture is more aggregated than the pure enantiomer, and the difference, negligible in the case of alanine derivatives, increases with the bulkiness of the side chain Rz.

The results show that a selective interaction takes place between enantiomeric molecules, resulting in a dimer associating two inverse configurated C5 conformers.

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