HETEROCYCLES

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■ ¹⁵N Nuclear Magnetic Resonance Spectroscopy of Some Nitrogen Heterocycles

Kenneth L. Williamson* and John D. Roberts

*Institute Professor of Chemistry, Emeritus and Lecturer, Gates and Grellisn Laboratories of, Chemistry, 164-30, California Institute of Technology , Pasadena, CA 91125, U.S.A.

Abstract

The potential power and utility of ¹⁵N NMR spectroscopy in heterocyclic chemistry is illustrated by the natural-abundance high-resolution ¹⁵N NMR spectra of representative thiadiazoles and related compounds. The ¹⁵N chemical shifts in these compounds were found to range over 250 ppm. The advantages and limitations of the method are discussed.