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. 2013 Jun 3;52(23):6076-9.
doi: 10.1002/anie.201302091. Epub 2013 Apr 29.

Indeno[2,1-b]fluorene: a 20-π-electron hydrocarbon with very low-energy light absorption

Akihiro Shimizu  1 , Ryohei Kishi, Masayoshi Nakano, Daisuke Shiomi, Kazunobu Sato, Takeji Takui, Ichiro Hisaki, Mikiji Miyata, Yoshito Tobe
Affiliations

Indeno[2,1-b]fluorene: a 20-π-electron hydrocarbon with very low-energy light absorption

Akihiro Shimizu et al. Angew Chem Int Ed Engl. .

Abstract

Smaller can be better: The first example of meta-quinodimethane embedded in an indenofluorene framework has been synthesized. 10,12-Dimesitylindeno[2,1-b]fluorene exhibits extremely low-energy light absorption, despite the small conjugation space of the molecule, which consists of only 20 π electrons.

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