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Characterization of 2-aryl-1,3,4-oxadiazoles by 15N and 13C NMR spectroscopy

✍ Scribed by Barbara Nowak-Wydra; Błażej Gierczyk; Grzegorz Schroeder

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
89 KB
Volume
41
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

^15^N NMR chemical shifts of 2‐aryl‐1,3,4‐oxadiazoles were assigned on the basis of the ^1^H–^15^N HMBC experiment. Chemical shifts of the nitrogen and carbon atoms in the oxadiazole ring correlate with the Hammett σ‐constants of substituents in the aryl ring (r^2^ ≥ 0.966 for N atoms). ^15^N NMR data are a suitable and sensitive means for characterizing long‐range electronic substituent effects. Additionally, ^13^C NMR data for these compounds are presented. Copyright © 2003 John Wiley & Sons, Ltd.

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