Benzonorcorrole NiII Complexes: Enhancement of Paratropic Ring Current and Singlet Diradical Character by Benzo-Fusion

Takuya Yoshida, Kohtaro Takahashi, Yuki Ide, Ryohei Kishi, Jun Ya Fujiyoshi, Sangsu Lee, Yuya Hiraoka, Dongho Kim, Masayoshi Nakano, Takahisa Ikeue, Hiroko Yamada, Hiroshi Shinokubo

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Fused benzene rings to antiaromatic compounds generally improve their stability but attenuate their antiaromaticity. The opposite case is now reported. NiII benzonorcorroles were synthesized and the effect of benzo-fusion on the antiaromaticity was elucidated. The benzo-fusion resulted in significant decrease of the HOMO–LUMO gaps and enhancement of the paratropic ring current effect. Furthermore, the introduction of the benzo groups induced singlet diradical character in the antiaromatic porphyrinoid.

Original languageEnglish
Pages (from-to)2209-2213
Number of pages5
JournalAngewandte Chemie - International Edition
Issue number8
Publication statusPublished - 2018 Feb 19

Bibliographical note

Funding Information:
This work was supported by JSPS KAKENHI grants JP26102003 (H.S.), JP15K21721 (H.S.), and JP17H05157 (M.N.), as well as by the Program for Leading Graduate Schools “Integrative Graduate Education and Research in Green Natural Sciences” from MEXT. T.Y. expresses his gratitude for a JSPS Research Fellowship for Young Scientists (JP16J10315). H.S. gratefully acknowledges the Murata Science Foundation for financial support. Work at the Yonsei University was supported by the Global Research Laboratory (2013K1A1A2A02050183) funded by the Ministry of Science, ICT and Future Planning.

Publisher Copyright:
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)


Dive into the research topics of 'Benzonorcorrole NiII Complexes: Enhancement of Paratropic Ring Current and Singlet Diradical Character by Benzo-Fusion'. Together they form a unique fingerprint.

Cite this