Spectrum of the Month
November 1997


Homonuclear 2D J-Resolved Spectroscopy experiment
of poly[trans-1,2-epoxyhexane-1-d].

Collaborator: David McCollum. Thanks David!

The 2dimensional J-resolved Experiment (hom2dj Experiment) allows you to determine chemical shift information in the F2 dimension while giving you the J-coupling in the F1 dimension. There is also a hetero-nuclear variant, in which you get 13C chemical shift information correlated with C-H J-couplings.

The spectrum may be symmetrized with the "foldj" command. However, this can lead to artifacts and one must compare the spectra before and after symmetrizing: In the example below, observe how the original data exhibit four peaks along the F2 dimension between 3.25 ppm and 3.40 ppm (along with their doublets in the F1 dimension).

After symmetrization, however, there seem to be five peaks with their doublet partners because of the folding through the center.


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