title: Synthesis, properties, and structures of benzo[1,2-b:4,5-b']bis[b]benzothiophene and benzo[1,2-b:4,5-b']bis[b]benzoselenophene.
abstract: Employing two consecutive cyclization reactions, benzo[1,2-b:4,5-b']bis[b]benzochalcogenophenes, which are pi-extended heteroarenes, were efficiently synthesized. Their electronic and crystal structures were elucidated on the basis of UV-vis spectra, electrochemical measurements, and X-ray structural analyses.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, 739-8527, Japan.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Ebata
authors.forename: Eigo
authors.initials: E
authors.lastname: Miyazaki
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Kazuo
authors.initials: K
authors.lastname: Takimiya