title: Ionic-liquid-assisted synthesis of the phosphorus interhalides [PBr4][IBr2] and [PBr4][I5Br7].
abstract: The phosphorus interhalides [PBr4][IBr2] (1) and [PBr4]2[I5Br7] (2) were prepared by reaction of PBr5and the interhalogen IBr in the ionic liquid [MeBu3N][N(Tf)2] (N(Tf)2: bis(trifluoromethylsulfonyl)amide). [PBr4][IBr2] (1) consists of tetrahedral [PBr4]+cations and linear [IBr2]-anions. [PBr4]2[I5Br7] (2) also contains [PBr4]+cations as well as the iodine bromide anion [I5Br7]2-. The latter represents the yet largest known polyiodinebromide. Moreover, (2) shows remarkable halogen release (IBr and Br2) of 96.8 wt% below 300 °C. For the ternary system P-Br-I, (1) and (2) are the first compounds that were characterized by crystal structure analysis. Composition, bonding situation and properties were further validated by energy dispersive X-ray (EDX) analysis, thermogravimetry (TG) and Raman spectroscopy.
authors.affiliation: Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, D-76131 Karlsruhe, Germany. claus.feldmann@kit.edu.
authors.forename: David
authors.initials: D
authors.lastname: Hausmann
authors.affiliation: Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, D-76131 Karlsruhe, Germany. claus.feldmann@kit.edu.
authors.forename: Ralf
authors.initials: R
authors.lastname: Köppe
authors.affiliation: Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, D-76131 Karlsruhe, Germany. claus.feldmann@kit.edu.
authors.forename: Silke
authors.initials: S
authors.lastname: Wolf
authors.affiliation: Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, D-76131 Karlsruhe, Germany. claus.feldmann@kit.edu.
authors.forename: Peter W
authors.initials: PW
authors.lastname: Roesky
authors.affiliation: Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, D-76131 Karlsruhe, Germany. claus.feldmann@kit.edu.
authors.forename: Claus
authors.initials: C
authors.lastname: Feldmann