A kinetically blocked 1,14:11,12-dibenzopentacene: A persistent triplet diradical of a non-Kekulé polycyclic benzenoid hydrocarbon

Yuan Li, Kuo-Wei Huang, Zhe Sun, Richard D. Webster, Zebing Zeng, Wangdong Zeng, Chunyan Chi, Ko Furukawa, Jishan Wu

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47 Scopus citations

Abstract

The synthesis of high-spin polycyclic hydrocarbons is very challenging due to their extremely high reactivity. Herein, we report the synthesis and characterization of a kinetically blocked 1,14:11,12-dibenzopentacene, DP-Mes, which represents a rare persistent triplet diradical of a non-Kekulé polycyclic benzenoid hydrocarbon. In contrast to its structural isomer 1,14:7,8-dibenzopentacene (heptazethrene) with a singlet biradical ground state, DP-Mes is a triplet diradical as confirmed by ESR and ESTN measurements and density functional theory calculations. DP-Mes also displays intermolecular antiferromagnetic spin interactions in solution at low temperature. © 2014 the Partner Organisations.
Original languageEnglish (US)
Pages (from-to)1908
JournalChemical Science
Volume5
Issue number5
DOIs
StatePublished - 2014

ASJC Scopus subject areas

  • Chemistry(all)

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