Strong Coupling in Nuclear Resonance Spectra. V. Perturbation Theory for the Extreme Coupling Case

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Abstract
The perturbation theory of NMR spectra is given for the case in which the relative chemical shift ν0δ between two groups is much smaller than the coupling constant J. Results are given for the systems AB, AB2, AB3, A2B2, and A2B3 from which it is possible to obtain the parameters from the appropriate spectra without detailed analysis. The proton spectra of methylacetylene is discussed as an example.