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Figure 5
The rigid-bond criterion is satisfied by both (a) and (b), but only (b) fulfils the enhanced rigid-bond restraint, as defined by Thorn et al. (2012BB131), from where the figure originates.

IUCrJ
Volume 12| Part 4| July 2025| Pages 421-434
ISSN: 2052-2525
https://doi.org/10.1107/S2052252525004361