Form (III) of artemisinin: discovery and crystallographic characterization of a new high-pressure polymorph

Fetah, B.; Connor, L.E.; Warren, M.R.; Doherty, C.L.; Oswald, I.D.H.

doi:10.1107/S205252062600291X

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 8
(a) Structures of the highest-energy interactions in the ART structure from PIXEL analysis. Molecules in grey represent the central molecule and the coloured molecule represents the transformed molecules. The curved arrows represent the pseudo-twofold rotation, and the dotted arrows highlight the translation in the pseudo 2₁-screw axis. (b) Graph of the total interaction energy (in kJ mol⁻¹) against the distance between the molecular centroids of the molecules involved in the interaction (in Å) for form (III) shown as square symbols. Triangles represent form (I) interactions over a similar pressure range. Lines serve as a guide to the eye.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 82| Part 3| June 2026| Pages 316-329

https://doi.org/10.1107/S205252062600291X

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