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Figure 4
Average C—H bond lengths in pyrene (blue) and methyl (pink) moieties determined by HAR refinements against selected datasets. Theoretical neutron distances were drawn as vertical lines for comparison (Allen & Bruno, 2010BB1).

IUCrJ
Volume 11| Part 4| July 2024| Pages 519-527
ISSN: 2052-2525
https://doi.org/10.1107/S2052252524003634