Conformationally Flexible Bis(9‐fluorenylidene)porphyrin Diradicaloids

• Published in: Angewandte Chemie International Edition Vol. 56; no. 43; pp. 13484 - 13488
• Main Authors: Zhang, Hejian, Phan, Hoa, Herng, Tun Seng, Gopalakrishna, Tullimilli Y., Zeng, Wangdong, Ding, Jun, Wu, Jishan
• Format: Journal Article
• Language: English
• Published: WEINHEIM Wiley 16.10.2017; Wiley Subscription Services, Inc
• Edition: International ed. in English
• Subjects: Chemistry; Chemistry, Multidisciplinary; Conformation; conformational change; diradicaloids; Electronic structure; magnetic properties; nickel; Physical properties; Physical Sciences; porphyrinoids; Protonation; Science & Technology; Squid; nickel; POLYCYCLIC AROMATIC-HYDROCARBON; FUSION; CRYSTAL-STRUCTURE; conformational change; SINGLET; MOLECULES; porphyrinoids; magnetic properties; BIRADICAL GROUND-STATE; QUINOIDAL PORPHYRIN DIMER; CHARACTER; ABSORPTION; diradicaloids

A stable 5,10‐bis(9‐fluorenylidene)porphyrin (Por‐Fl) diradicaloid was synthesized. It shows a quinoidal, saddle‐shaped geometry in the single crystal but can be thermally populated to a triplet diradical both in solution and in the solid state. Coordination with the Ni2+ ion (Por‐Fl‐Ni) does not si...