title: A structural isomer of nonaromatic porphyrin: preparation of 20pi-conjugated porphycene based on electronic perturbation.
abstract: A porphycene having four CF3 groups at the beta-pyrrolic positions affords a stable 20pi-conjugated form in the presence of a 2H+-2e- donor due to the high redox potential of the tetrapyrrole ring framework. No visible band in the UV-vis spectrum and the highly ruffled structure determined by X-ray crystallography support its nonaromatic character. The ethylene bridge moiety in the 20pi-conjugated framework displayed the olefinic reactivities.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Matsuo
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Ito
authors.forename: Nobuko
authors.initials: N
authors.lastname: Kanehisa
authors.forename: Takashi
authors.initials: T
authors.lastname: Hayashi