title: Highly Strained Heterocycles Constructed from Boron-Boron Multiple Bonds and Heavy Chalcogens.
abstract: The reactions of a diborene with elemental selenium or tellurium are shown to afford a diboraselenirane or diboratellurirane, respectively. These reactions are reminiscent of the sequestration of subvalent oxygen and nitrogen in the formation of oxiranes and aziridines; however, such reactivity is not known between alkenes and the heavy chalcogens. Although carbon is too electronegative to affect the reduction of elements with lower relative electronegativity, the highly reducing nature of the B-B double bond enables reactions with Se(0) and Te(0) . The capacity of multiple bonds between boron atoms to donate electron density is highlighted in reactions where diborynes behave as nucleophiles, attacking one of the two Te atoms of diaryltellurides, forming salts consisting of diboratellurenium cations and aryltelluride anions.
authors.affiliation: Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany. h.braunschweig@uni-wuerzburg.de.
authors.forename: Holger
authors.initials: H
authors.lastname: Braunschweig
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
authors.forename: Philipp
authors.initials: P
authors.lastname: Constantinidis
authors.affiliation: Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
authors.forename: Theresa
authors.initials: T
authors.lastname: Dellermann
authors.affiliation: Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
authors.forename: William C
authors.initials: WC
authors.lastname: Ewing
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
authors.forename: Ingo
authors.initials: I
authors.lastname: Fischer
authors.affiliation: Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
authors.forename: Merlin
authors.initials: M
authors.lastname: Hess
authors.affiliation: EaStCHEM School of Chemistry, University of St Andrews, Fife, KY16 9ST, UK.
authors.forename: Fergus R
authors.initials: FR
authors.lastname: Knight
authors.affiliation: Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
authors.forename: Anna
authors.initials: A
authors.lastname: Rempel
authors.affiliation: Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
authors.forename: Christoph
authors.initials: C
authors.lastname: Schneider
authors.affiliation: Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Ullrich
authors.affiliation: Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, Sussex, UK.
authors.forename: Alfredo
authors.initials: A
authors.lastname: Vargas
authors.affiliation: EaStCHEM School of Chemistry, University of St Andrews, Fife, KY16 9ST, UK.
authors.forename: J Derek
authors.initials: JD
authors.lastname: Woollins
keywords: boron; heterocycles; multiple bonds; selenium; tellurium