title: Clicking the Arsenic-Carbon Triple Bond: An Entry into a New Class of Arsenic Heterocycles.
abstract: Arsaalkynes can undergo regioselective and quantitative [3+2] cycloaddition reactions with organic azides to give hitherto unknown 3H-1,2,3,4-triazaarsole derivatives. The reaction product was obtained as a white, air- and moisture-stable solid, and the presence of a planar, five-membered arsenic heterocycle was unambiguously verified by means of X-ray crystallography. DFT calculations gave insight into the electronic structure of these novel compounds compared to tetrazoles and triazaphospholes. The coordination chemistry towards Re(I) was investigated and compared with the structurally related phosphorus-containing ligand. These preliminary investigations pave the way for a new class of arsenic heterocycles and fill the gap between the azaarsoles already known.
authors.affiliation: Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 34/36, 14195, Berlin, Germany.
authors.forename: Gregor
authors.initials: G
authors.lastname: Pfeifer
authors.affiliation: Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 34/36, 14195, Berlin, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Papke
authors.affiliation: Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 34/36, 14195, Berlin, Germany.
authors.forename: Daniel
authors.initials: D
authors.lastname: Frost
authors.affiliation: Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 34/36, 14195, Berlin, Germany.
authors.forename: Julian A W
authors.initials: JA
authors.lastname: Sklorz
authors.affiliation: Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 34/36, 14195, Berlin, Germany.
authors.forename: Marija
authors.initials: M
authors.lastname: Habicht
authors.affiliation: Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 34/36, 14195, Berlin, Germany. c.mueller@fu-berlin.de.
authors.forename: Christian
authors.initials: C
authors.lastname: Müller
keywords: azaarsoles; cycloaddition; heterocycles; main-group chemistry; structure elucidation