title: Antiaromatic hexaphyrins and octaphyrins stabilized by the hydrogen-bonding interactions of meso-imidazolyl groups.
abstract: Stable antiaromatic expanded porphyrins were designed by the judicious implementation of meso-imidazolyl groups, which cause stabilization through the creation of a hydrogen-bonding network that overcomes antiaromatic electronic destabilization. Both the [28]hexaphyrin 1 and the [36]octaphyrin 2, which contain imidazolyl groups at two opposite meso positions, are shown to be stable Hückel antiaromatic species.
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Mori
authors.forename: Young Mo
authors.initials: YM
authors.lastname: Sung
authors.forename: Byung Sun
authors.initials: BS
authors.lastname: Lee
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Osuka