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Figure 1
(a) Formation of the rubidium(I) complex of H4L1,2, [Rb(H3L1,2)(CH3OH)] (1) showing a six-coordinated environment; (b) loose capture of Rb+; and (c) space-filling structure. (d) Formation of the caesium(I) complex of H4L1,2, [Cs(H3L1,2)]·3CHCl3 (2) showing a ten-coordinated environment; (e) tight capture of Cs+ in the deep pocket similar to (f) a baseball glove; and (g) space-filling structure. Non-coordinated solvent molecules are not shown.

IUCrJ
Volume 9| Part 1| January 2022| Pages 43-48
ISSN: 2052-2525
https://doi.org/10.1107/S2052252521010563