Efficient measurement of the sign and the magnitude of long-range proton-carbon coupling constants from a spin-state-selective HSQMBC-COSY experiment

Josep Saurí, Teodor Parella

    Research output: Contribution to journalArticleResearchpeer-review

    15 Citations (Scopus)

    Abstract

    A spin state-selective Heteronuclear Single-Quantum Multiple-Bond Connectivities (HSQMBC-COSY) experiment is proposed to measure the sign and the magnitude of long-range proton-carbon coupling constants (nJ(CH); n > 1) either for protonated or for non-protonated carbons in small molecules. The simple substitution of the selective 180° 1H pulse in the original selHSQMBC pulse scheme by a hard one allows the simultaneous evolution of both proton-proton and proton-carbon coupling constants during the refocusing period and enables a final COSY transfer between coupled protons. The successful implementation of the IPAP principle leads to separate mixed-phase α/β cross-peaks from which nJ(CH) values can be easily measured by analyzing their relative frequency displacements in the detected dimension. Copyright © 2012 John Wiley & Sons, Ltd.
    Original languageEnglish
    Pages (from-to)717-721
    JournalMagnetic Resonance in Chemistry
    Volume50
    Issue number11
    DOIs
    Publication statusPublished - 1 Nov 2012

    Keywords

    • HSQMBC
    • HSQMBC-COSY
    • IPAP
    • long-range proton-carbon coupling constants

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