OPTICAL-ACTIVITY OF CRYSTALLINE GLUTAMIC ACIDS

Citation
T. Asahi et al., OPTICAL-ACTIVITY OF CRYSTALLINE GLUTAMIC ACIDS, Acta crystallographica. Section A, Foundations of crystallography, 52, 1996, pp. 766-769
Citations number
26
Categorie Soggetti
Crystallography
ISSN journal
01087673
Volume
52
Year of publication
1996
Part
5
Pages
766 - 769
Database
ISI
SICI code
0108-7673(1996)52:<766:OOCGA>2.0.ZU;2-L
Abstract
As the first study on gyro-optical properties of amino acids, temperat ure dependences of the gyration tensor components of L- and D-glutamic acids were measured by using the HAUP (high-accuracy universal polari meter). It was confirmed that the corresponding tensor components of t he two enantiomers are the same in magnitude but opposite in sign. It is proposed that r = (rho(C)(0) - rho(S)(0))/rho(C)(0) be defined as t he 'chirality index', where rho(C)(0) and rho(S)(0) designate rotatory powers per molecule in a crystal and in a dissolved state in liquid, respectively. It represents a measure of structural contribution of op tical activity (OA) in a crystal. This value is 0.992 in glutamic acid s.