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Anionic forms of a macrocyclic cyclophane were crystallized by treating the neutral hydrocarbon with alkali metals (Li, Na and K). The di-anions show decreased bond-length alternation, consistent with global aromaticity, whereas the anti-aromatic tetra-anion has a low-symmetry geometry.
more » « less- NSF-PAR ID:
- 10491571
- Publisher / Repository:
- RSC
- Date Published:
- Journal Name:
- Chemical Science
- Volume:
- 14
- Issue:
- 48
- ISSN:
- 2041-6520
- Page Range / eLocation ID:
- 14109 to 14114
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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