Solvent inclusion in the structural voids of form II carbamazepine: single-crystal X-ray diffraction, NMR spectroscopy and Hirshfeld surface analysis

Abstract

Single-crystal X-ray diffraction and solution 1H NMR spectroscopy, in conjunction with Hirshfeld surface analysis, give evidence of solvent inclusion in the trigonal polymorph of carbamazepine, which in the unsolvated form is characterised by the presence of large structural voids.