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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 19. Polyaza metacyclophane anion receptors and its anionic dimer complexes.

Figure 19

(A) Molecular structure of receptor 45.

(B) Single crystal X-ray structure of the complex [Cl2]2−⊂ [H545]5+.

(C) Single crystal X-ray structure of the complex [Br2]2−⊂ [H545]5+.

(D) Single crystal X-ray structure of the complex [I2]2−⊂ [H545]5+.

All anions encapsulated within the cavity and the protonated 45 are shown in space-filling form. Inter-halide distances: (B) 3.51 Å, (C) 5.01 Å and (D) 5.30 Å. Color code: C = gray, N = blue, Cl = green, Br = brown and I = purple. The counter anions and solvent molecules outside the cavities are omitted for clarity.