title: Chemical reduction and dimerization of 1-chloro-2,3,4,5-tetraphenylborole.
abstract: As neutral isoelectronic analogues of the elusive cyclopentadienyl cation, boroles have been of interest for their prospective applications as strong Lewis acids, chromophores, and electron acceptors. Recently our group discovered a π-nucleophilic boryl anion based on the borole system. In an effort to extend borole chemistry, we now report the molecular structure of 1-chloro-2,3,4,5-tetraphenylborole (1) and its corresponding borole dianion resulting from the two-electron reduction of 1 with KC(8). The thermally induced dimerization of 1 yields an unprecedented boracyclohexadiene/borolene spiro-bicyclic compound and the resulting dimer was fully characterized including a single-crystal X-ray analysis.
authors.affiliation: Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. h.braunschweig@mail.uni-wuerzburg.de
authors.forename: Holger
authors.initials: H
authors.lastname: Braunschweig
authors.forename: Ching-Wen
authors.initials: CW
authors.lastname: Chiu
authors.forename: Johannes
authors.initials: J
authors.lastname: Wahler
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Radacki
authors.forename: Thomas
authors.initials: T
authors.lastname: Kupfer