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Improved multiplicity‐editing of HMBC NMR spectra
Author(s) -
Benie Andrew J.,
Sørensen Ole W.
Publication year - 2006
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1855
Subject(s) - multiplicity (mathematics) , chemistry , spectral line , coupling constant , broadband , pulse sequence , excitation , nuclear magnetic resonance , stereochemistry , analytical chemistry (journal) , physics , mathematical analysis , optics , particle physics , organic chemistry , quantum mechanics , mathematics
A new improved multiplicity‐edited HMBC experiment is introduced that leads to better J cross‐talk suppression in the even (i.e. C + CH 2 groups) and odd (i.e. CH + CH 3 groups) subspectra. By combining data recorded with three different pulse sequences J cross‐talk becomes a second‐order effect in Δ 1 J , i.e. the deviation of an actual 1 J coupling constant from the value 1 J 0 used in setting delays τ = ( 1 J 0 ) −1 /2, which is adequate for most applications. As for the original multiplicity‐edited HMBC experiment, the improved experiment can be performed with a single excitation delay or implemented in a broadband version similar to broadband HMBC. Copyright © 2006 John Wiley & Sons, Ltd.
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