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Azacalixquinarenes: From Canonical to (Poly-)Zwitterionic Macrocycles

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Academic year: 2021

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Figure

Figure 1. Previously reported azacalixphyrin macrocycle (top) and illustration of the canonical-zwitterionic equilibrium in 2,5- 2,5-diaminobenzoquinone diimines (bottom)
Figure 2. Single crystal structures of canonical
Figure 3. Single crystal structure of 2a zwitterionic (z), canonical (c) and aromatic (
Figure 4. Single crystal structures of 3a. The electronic stru aromatic (Ar). N-octyl chains are omitted for clarity.
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