Inverse editing of protons in two‐dimensional homonuclear and heteronuclear relayed COSY spectra
1991; Wiley; Volume: 29; Issue: 3 Linguagem: Inglês
10.1002/mrc.1260290308
ISSN1097-458X
AutoresUte Wollborn, Dieter Leibfritz,
Tópico(s)Spectroscopy and Quantum Chemical Studies
ResumoAbstract Several 1D and 2D inverse proton editing pulse sequences have recently been introduced. One of these, the REPAY sequence, allows the individual editing of XH or XH 2 groups. Some new 2D combinations of one‐ and two‐dimensional REPAY experiments with a COSY or TOCSY transfer are described. These combinations provide various possibilities for structural elucidation: the determination of heteronuclear long‐range coupling constants n J (CH) ( n = 2, 3), the editing of XH or XH 2 groups in two‐dimensional H,H COSY spectra and the editing of XH or XH 2 groups in X,H COSY spectra followed by a relayed transfer. In contrast to earlier versions of SHIPPED‐COSY experiments, the spectra show improved sensitivity and offer the possibility of selecting XH 2 groups only, and contain no 1 J (XH) coupling because of heteronuclear X decoupling.
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