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. 2022 Jun 15;22(7):4513–4527. doi: 10.1021/acs.cgd.2c00433

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© 2022 The Authors. Published by American Chemical Society

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Observed (black points), calculated (red line), and difference profiles (green) for the Rietveld refinements of CARB/ESAL polymorphs A (a) and B (b). Blue tick marks denote the peak positions. Note that form B shows a phase impurity (CARB) at 13.1 and 15.3° 2θ. (c, d) Hydrogen bonding motifs showing one layer for form A (panel c) and the packing motif of the 2₁-mediated carbamazepine chain and ESAL···CARB interactions for form B (panel d). Green (dotted) lines indicate the strong H-bonding interactions. Hydrogen atoms are omitted in panel (d) for clarity.