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Figure 1
(a) Appel salt structure; (b) electrostatic potential φESP(r); (c) potential acting on an electron in a molecule φPAEM(r); (d) exchange energy density per electron ɛx(r). All quantities are mapped on zero-flux surface (ZFS) of experimental electron density. Red arrow points at electrophilic site near the centre of S—S bond, bond paths are marked with thin green lines. [Views b, c and d are reprinted with permission of the International Union of Crystallography, from Bartashevich et al., 2021BB3.]

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 77| Part 6| December 2021| Pages 932-933
https://doi.org/10.1107/S2052520621012440
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