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Constant time inverse‐detection gradient accordion rescaled heteronuclear multiple bond correlation spectroscopy: CIGAR‐HMBC
Author(s) -
Hadden Chad E.,
Martin Gary E.,
Krishnamurthy V. V.
Publication year - 2000
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(200002)38:2<143::aid-mrc624>3.0.co;2-s
Subject(s) - heteronuclear molecule , chemistry , inverse , heteronuclear single quantum coherence spectroscopy , range (aeronautics) , analytical chemistry (journal) , constant (computer programming) , two dimensional nuclear magnetic resonance spectroscopy , statistics , chromatography , stereochemistry , nuclear magnetic resonance spectroscopy , mathematics , geometry , materials science , computer science , composite material , programming language
A further refinement of the recently reported IMPEACH‐MBC long‐range heteronuclear shift correlation experiment is described. The new experiment, CIGAR‐HMBC (constant time inverse‐detected gradient accordion rescaled long‐range heteronuclear multiple bond correlation), modifies the constant time variable delay of the IMPEACH‐MBC experiment to allow user‐determined scaling of F 1 modulation. The refinement offered in the CIGAR‐HMBC experiment allows the investigator to reintroduce whatever degree of F 1 modulation is desired to authenticate weak long‐range responses. Results obtained with the CIGAR‐HMBC experiment using a range of values for J scale are compared with results obtained with identically optimized ACCORD‐HMBC and IMPEACH‐MBC experiments. Copyright © 2000 John Wiley & Sons, Ltd.