@article{027254d209404d05b9a9e9a720bad6b8,
title = "An Anomalous Antiaromaticity That Arises from the Cycloheptatrienyl Anion Equivalent",
abstract = "A fused azulene dimer with helicene-like structure prepared by simple Suzuki–Miyaura coupling between naphthalene and azulene derivatives shows absorption in the near-IR region up to 900 nm owing to the effective π-expansion. The newly formed seven-membered ring exhibits a positive NICS(1) value that arises from the antiaromatic cycloheptatrienyl anionic structure.",
author = "Keiji Uehara and Peifeng Mei and Tomohisa Murayama and Fumito Tani and Hironobu Hayashi and Mitsuharu Suzuki and Naoki Aratani and Hiroko Yamada",
note = "Funding Information: This work was partly supported by CREST JST (No. JPMJCR15F1) and JSPS KAKENHI Grant Numbers JP16H02286 and JP26105004 to H. Y., JP16K17949 to M. S., and JP17H03042 to N. A. We appreciate kind support of Profs. A. Osuka and T. Tanaka, and Mr. T. Yamakado at Kyoto University for fruitful discussions, as well as Prof. R. Herges at Kiel University for ACID calculations. We also thank Ms. Y. Nishikawa, NAIST, for the mass spectroscopy measurements. Publisher Copyright: {\textcopyright} 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",
year = "2018",
month = sep,
day = "9",
doi = "10.1002/ejoc.201800769",
language = "English",
volume = "2018",
pages = "4508--4511",
journal = "European Journal of Organic Chemistry",
issn = "1434-193X",
publisher = "Wiley-VCH Verlag",
number = "33",
}