title: Electronegative oligothiophenes based on a hexafluorocyclopentene-annelated thiophene unit.
abstract: [Structure: see text] The synthesis of hexafluorocyclopenta[c]thiophene and its based oligothiophenes is described. The effectiveness of a hexafluorocyclopentene unit to lower the LUMO level without disturbing the effective conjugation could be unambiguously clarified by spectroscopic measurements and X-ray analysis.
authors.affiliation: The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Ie
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Umemoto
authors.forename: Takahiro
authors.initials: T
authors.lastname: Kaneda
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Aso