Deceptive simplicity in ABMX N.M.R. spectra. III. The spectrum of benzothiophen

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Abstract
The analysis of the high resolution spectrum of benzothiophen in several solvents is reported. It is noted that the conditions are close to those leading to deceptively simple spectra, but under very high resolution sufficient lines could be resolved to give an unambiguous analysis. The inter-ring, long-range coupling constants, as well as their relative signs, could be determined from these spectra as a result of the strong coupling between protons.

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