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. Author manuscript; available in PMC: 2019 Jan 11.
Published in final edited form as: Chem. 2017 Dec 14;4(1):46–93. doi: 10.1016/j.chempr.2017.10.015

Figure 13. Acyclic bisurea-based receptors and their anionic complexes.

Figure 13

(A) Molecular structures of receptors 27 and 28.

(B) Single crystal X-ray structure of the complex [(H2PO4)4]4− ⊂ 274.

(C) Single crystal X-ray structure of the complex [(H2PO4)4]4− ⊂ 284.

All anions encapsulated within the cavities are shown in space-filling form. Color code: C = gray, N = blue, O = red, and P = yellow. The counter cations and solvent molecules outside the cavities are omitted for clarity.