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Distinguishing two‐bond and three‐bond 13 C 1 H connectivities by 2D BIRD‐decoupled difference spectra: The DODO pulse
Author(s) -
Reynolds William F.,
Yang JiPing,
Enriquez Raul G.
Publication year - 1995
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260330903
Subject(s) - chemistry , spectral line , sequence (biology) , pulse sequence , spectrum (functional analysis) , protonation , pulse (music) , stereochemistry , nuclear magnetic resonance , organic chemistry , optics , physics , quantum mechanics , ion , biochemistry , detector
A modified BIRD pulse, called the DODO pulse, was developed and incorporated into one version of the FLOCK sequence. Addition of the two‐dimensional spectra obtained with this modified sequence and with the unmodified FLOCK sequence produces a normal indirectly bonded 13 C 1 H shift correlation spectrum. Subtraction of one spectrum from the other generates a difference spectrum which allows a clear distinction between two‐bond and three‐bond 13 C 1 H connectivities among protonated carbons.