Isotope effect of optical activity measurements on L-α-alanine

W. Darge; I. Laczkó; W. Thiemann

doi:10.1007/bf02516988

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 30: Issue 2

Isotope effect of optical activity measurements on L-α-alanine

Authors:

W. Darge

W. Darge Fachhochschule Aachen, Abteilung Jülich, 517 Jülich Ginsterweg, (FRG)

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I. Laczkó

I. Laczkó Biological Research Center Institute of Biophysics, Odesszai Körut 62, 6701 Szeged, (Hungary)

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W. Thiemann

W. Thiemann Kernforschungsanlage Jülich Institut für Chemie (ICH), Postfach 365, 517 Jülich, (FRG)

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Pages:: 521–526

Online Publication Date:: 09 Jan 2007

Publication Date:: 01 Sep 1976

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02516988

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Abstract

If an optically active organic substance is labelled in the chirality center with another isotopic species (such as¹⁵N for¹⁴N) a pronounced variation of rotatory power is predicted. We tried to varify this idea experimentally on L-α-alanine and found an isotope effect of ORD (optical rotatory dispersion). The magnitude of the rotation is mainly dependent on the pH of the solvent. The ratio of the optical activity alanine-¹⁴N/alanine-¹⁵N is about 1.02. The molecular rotations show a consistently lower ratio but it can be seen that the isotope effect is not only a mass effect.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)