title: A Stable π-Conjugated Singlet Biradical.
abstract: A large polycyclic hydrocarbon with a singlet biradical ground state has been obtained by the combined effects of topology and electron-accepting aromatic substituents, which stabilize its open-shell singlet state.
authors.affiliation: Organisch-Chemisches Institut, Ruprecht-Karls-Universität, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.|Centre of Advanced Materials (CAM), Ruprecht-Karls-Universität, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany.
authors.forename: Felix
authors.initials: F
authors.lastname: Hinkel
authors.affiliation: Organisch-Chemisches Institut, Ruprecht-Karls-Universität, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.|InnovationLab GmbH, Speyrer Strasse 4, 69115, Heidelberg, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Freudenberg
authors.affiliation: Organisch-Chemisches Institut, Ruprecht-Karls-Universität, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany. uwe.bunz@oci.uni-heidelberg.de.|Centre of Advanced Materials (CAM), Ruprecht-Karls-Universität, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany. uwe.bunz@oci.uni-heidelberg.de.
authors.forename: Uwe H F
authors.initials: UH
authors.lastname: Bunz
keywords: aromaticity; polycycles; quinoids; radicals; zethrenes