title: A stable non-Kekulé singlet biradicaloid from meso-free 5,10,20,25-tetrakis(pentafluorophenyl)-substituted [26]hexaphyrin(1.1.1.1.1.1).
abstract: A meso,meso-diketohexaphyrin was isolated and characterized as a chemically stable non-Kekulé singlet biradicaloid. Two unpaired electrons are seemingly delocalized on two tripyrrolic units separated by C=O bonds. These results underscore the potential of expanded porphyrins to achieve unique electronic states.
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
authors.forename: Taro
authors.initials: T
authors.lastname: Koide
authors.forename: Ko
authors.initials: K
authors.lastname: Furukawa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Shinokubo
authors.forename: Jae-Yoon
authors.initials: JY
authors.lastname: Shin
authors.forename: Kil Suk
authors.initials: KS
authors.lastname: Kim
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Osuka