A Sterically Congested Nitrogenated Benzodipentaphene with a Double pi-Expanded Helicene Structure


Herein, we describe a series of three sterically congested nitrogenated benzodipentaphenes, one of which shows a highly distorted aromatic backbone with an unprecedented double p-expanded helicene structure.



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Chen, FK; Gu, WT; Saeki, A; Melle-Franco, M; Mateo-Alonso, A

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A.M.-A. acknowledge support of the Basque Science Foundation for Science (Ikerbasque), POLYMAT, the University of the Basque Country (Grupo de Investigacion No. GIU17/054), Gobierno Vasco (No. PIBA 2019-09 and BERC program), and Gobierno de Espana (Ministerio de Economia y Competitividad No. CTQ2016-77970-R) and thank for technical and human support provided by SGIker of UPV/EHU and European funding (ERDF and ESF). F.C. and A.M.-A acknowledge that this project has received funding from the European Union's Horizon 2020 Research and Innovation Programme, under the Marie Sklodowska-Curie Grant Agreement No. 839626. A.M.-A. acknowledge that this project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 Research and Innovation Programme (Grant Agreement No. 722951). A.S. acknowledges the support of Japan Society for the Promotion of Science (JSPS) with the KAKENHI Grantin-Aid for Scientific Research (A) (Grant No. JP16H02285). M.M.-F. acknowledges support from the Portuguese Foundation for Science and Technology (FCT), under the project IF/00894/2015, and the project CICECO-Aveiro Institute of Materials, FCT ref. UID/CTM/50011/2019, UIDB/50011/2020, and UIDP/50011/2020, financed by national funds through the FCT/MEC and, when appropriate, cofinanced by FEDER, under the PT2020 Partnership Agreement.

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