On the interference of J(HH) modulation in HSQMBC-IPAP and HMBC-IPAP experiments

Josep Saurí, Teodor Parella

    Research output: Contribution to journalArticleResearchpeer-review

    14 Citations (Scopus)

    Abstract

    The effects of phase modulation due to homonuclear proton-proton coupling constants in HSQMBC-IPAP and HMBC-IPAP experiments are experimentally evaluated. We show that accurate values of small proton-carbon coupling constants, nJCH, can be extracted even for phase-distorted cross-peaks obtained from a selHSQMBC experiment applied simultaneously on two mutually J-coupled protons. On the other hand, an assessment of the reliability of nJCH measurement from distorted cross-peaks obtained in broadband IPAP versions of equivalent HMBC and HSQMBC experiments is also presented. Finally, we show that HMBC-COSY experiments could be an excellent complement to HMBC for the measurement of small nJCH values. Copyright © 2013 John Wiley & Sons, Ltd.
    Original languageEnglish
    Pages (from-to)509-516
    JournalMagnetic Resonance in Chemistry
    Volume51
    Issue number9
    DOIs
    Publication statusPublished - 1 Sep 2013

    Keywords

    • HMBC
    • HSQMBC
    • IPAP
    • proton-carbon coupling constants
    • selHSQMBC

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