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HETLOC, an Efficient Method for Determining Heteronuclear Long‐Range Couplings with Heteronuclei in Natural Abundance
Author(s) -
Kurz Michael,
Schmieder Peter,
Kessler Horst
Publication year - 1991
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199113291
Subject(s) - heteronuclear molecule , heteroatom , coupling constant , proton , spin (aerodynamics) , chemistry , range (aeronautics) , coupling (piping) , abundance (ecology) , spectroscopy , analytical chemistry (journal) , nuclear magnetic resonance spectroscopy , physics , materials science , stereochemistry , chromatography , thermodynamics , organic chemistry , nuclear physics , metallurgy , composite material , ring (chemistry) , particle physics , quantum mechanics , fishery , biology
Exceptionally high accuracy and detection limits characterize the NMR experiment, a variant of TOSCY (TOSCY = Total Correlation Spectroscopy), described here for the determination of heteronuclear 3 J couplings. No enrichment of the heteroatom is necessary. The process, which also yields coupling constants smaller than the signal width, is only applicable to proton‐bearing heteroatoms. In addition, the protons linked by TOSCY transfer should belong to the same spin system. Application in the determination of the angle ϕ in peptides demonstrates the performance of the process.