Premium
A General Method for Extracting Individual Coupling Constants from Crowded 1 H NMR Spectra
Author(s) -
Sinnaeve Davy,
Foroozandeh Mohammadali,
Nilsson Mathias,
Morris Gareth A.
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201508691
Subject(s) - homonuclear molecule , spins , coupling constant , spectral line , scalar (mathematics) , chemistry , j coupling , chemical shift , multiplet , coupling (piping) , dipole , limit (mathematics) , resolution (logic) , physics , nuclear magnetic resonance , molecule , quantum mechanics , computer science , materials science , condensed matter physics , mathematics , artificial intelligence , mathematical analysis , geometry , metallurgy
Couplings between protons, whether scalar or dipolar, provide a wealth of structural information. Unfortunately, the high number of 1 H‐ 1 H couplings gives rise to complex multiplets and severe overlap in crowded spectra, greatly complicating their measurement. Many different methods exist for disentangling couplings, but none approaches optimum resolution. Here, we present a general new 2D J‐resolved method, PSYCHEDELIC, in which all homonuclear couplings are suppressed in F 2 , and only the couplings to chosen spins appear, as simple doublets, in F 1 . This approaches the theoretical limit for resolving 1 H‐ 1 H couplings, with close to natural linewidths and with only chemical shifts in F 2 . With the same high sensitivity and spectral purity as the parent PSYCHE pure shift experiment, PSYCHEDELIC offers a robust method for chemists seeking to exploit couplings for structural, conformational, or stereochemical analyses.