The analysis of the proton magnetic resonance spectra of heteroaromatic systems. V. Diazanaphthalenes
Keyword(s):
The proton magnetic resonance spectra of the four isomeric diazanaphthalenes, quinoxaline, phthalazine, quinazoline, and cinnoline, all as dilute solutions in carbon tetrachloride and acetone, have been investigated at 100 Mc/s. The chemical shifts and coupling constants have been obtained by direct calculation or, where appropriate, by an iterative procedure. Long-range coupling constants between protons separated by five and six bonds have been observed.
1965 ◽
Vol 20
(10)
◽
pp. 948-956
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1968 ◽
Vol 72
(7)
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pp. 2344-2351
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