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Novel selective 1D experiments based on heteronuclear J cross‐polarization
Author(s) -
Parella Teodor,
Belloc Jordi,
SánchezFerrando Francisco,
Virgili Albert
Publication year - 1999
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/(sici)1097-458x(199909)37:9<631::aid-mrc512>3.0.co;2-0
Subject(s) - heteronuclear molecule , chemistry , proton , coupling constant , polarization (electrochemistry) , inverse , coherence (philosophical gambling strategy) , analytical chemistry (journal) , nuclear magnetic resonance , nuclear magnetic resonance spectroscopy , stereochemistry , organic chemistry , physics , nuclear physics , geometry , mathematics , particle physics , quantum mechanics
Selective 1 H– 13 C inverse NMR experiments based on heteronuclear cross‐polarization (HCP) are presented. Practical details on the implementation of one‐bond [ 1 J (C,H)] optimized and pseudo‐3D HCP experiments combined with gradient coherence selection are reported. On the other hand, accurate values for long‐range proton–carbon coupling constants [ n J (C,H); n > 1] can be measured from ultra‐clean in‐phase 1D proton multiplets resulting of long‐range optimized experiments. Alternatively, such heteronuclear connectivities can be also clearly elucidated using a 1 H‐selective 13 C‐detected version in which signals exclusively arise from selective transfer of a selected proton to all long‐range coupled carbon nuclei. Copyright © 1999 John Wiley & Sons, Ltd.