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Pure In‐Phase Heteronuclear Correlation NMR Experiments

2014; Wiley; Volume: 53; Issue: 32 Linguagem: Inglês

10.1002/anie.201404136

1521-3773

Laura Castañar, Josep Saurí, R. Thomas Williamson, Albert Virgili, Teodor Parella,

Molecular spectroscopy and chirality

Abstract A general NMR approach to provide pure in‐phase (PIP) multiplets in heteronuclear correlation experiments is described. The implementation of a zero‐quantum filter efficiently suppresses any unwanted anti‐phase contributions that usually distort the multiplet pattern of cross‐peaks and can hamper their analysis. The clean pattern obtained in PIP‐HSQMBC experiments is suitable for a direct extraction of coupling constants in resolved signals, for a peak‐fitting process from a reference signal, and for the application of the IPAP technique in non‐resolved multiplets.