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

Josep Saurí, Teodor Parella*

*Autor corresponent d’aquest treball

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15 Cites (Scopus)

Resum

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.

Idioma originalAnglès
Pàgines (de-a)509-516
Nombre de pàgines8
RevistaMagnetic Resonance in Chemistry
Volum51
Número9
DOIs
Estat de la publicacióPublicada - de set. 2013
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