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Figure 3
In situ 1H→13C cross polarization NMR spectra recorded as a function of time during the crystallization of m-aminobenzoic acid (m-ABA) from methanol, showing the region of the spectrum containing the peak for the carboxyl­ate group. The known peak positions for the carboxyl­ate groups in Forms I and III are highlighted by dashed lines. (a) The intensity contour plot showing all spectra recorded as a function of time during the in situ study. (b) Summation of the first two spectra (bottom) and the last two spectra (top) recorded during the in situ study. Figure from Harris et al. (2017BB25). Used with permission.

IUCrJ
Volume 4| Part 4| July 2017| Pages 350-359
ISSN: 2052-2525