15N NMR study of bi- and tricyclic 1,2,3
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Bertrand J. Jean-Claude; Christopher I. Williams
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Article
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1998
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John Wiley and Sons
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English
β 341 KB
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The 15N NMR spectra of the novel seven-membered 1,2,3,5-tetrazepinone ring systems were studied. The chemical shift of N-2 was found to be signiΓcantly responsive to substituent changes at the phenyl ring. As the electron-withdrawing character of the substituents increased, N-2 became more deshielde