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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 23. Cyclic hexaurea-based anion receptor 53 and its chloride anion dimer complex.

Figure 23

(A) Molecular structure of 53.

(B) Sideview of the crystal structure of the complex [Cl2]2−⊂ 53.

(C) Top view of the crystal structure of the complex [Cl2]2−⊂ 53.

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