Heptacene: Increased Persistence of a 4<i>n</i>+2 π‐Electron Polycyclic Aromatic Hydrocarbon by Oxidation to the 4<i>n</i> π‐Electron Dication

Abstract

An unexpectedly stable dication: Heptacene (a 4n+2 π-electron compound) is so highly reactive that it cannot be isolated. Its dication (a 4n π-electron compound) can be obtained from heptacene dimers/oligomers in sulfuric acid at room temperature and can be kept for more than one year in the absence of oxygen. (See picture for the UV/Vis-NIR spectra of the dications of tetracene to heptacene.) As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.