A novel two-dimensional method, SEA XLOC, for distinguishing between two- and three-bond correlations in heteronuclear NMR spectroscopy is introduced and demonstrated on ibuprofen and by a complete set of correlations with a simple and most complex quaternary 13C multiplet in strychnine.
Novel NMR experiments, BANGO SEA XLOC–H2OBC or BANGO HMBC–H2OBC, deliver complete heteronuclear correlations and assignments on a time scale of minutes on small molecules.
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