title: Boron di- and tri-cations.
abstract: Previous work on boron di- and tri-cations is reviewed. The structural chemistry of representative examples of these classes of compound has been probed by determination of the single-crystal X-ray structures of [(4-Mepy)4B]Br3 and [py3BH]Br2. The electronic structures of the polycations [(py)3BH]2+, [(py)3BBr]2+, [(4-Mepy)3BH]2+, [(4-Mepy)4B]3+, [(Me3P)3BH]2+ and [(Me3P)4B]3+ have been examined by DFT methods. The atomic charges on these cations were evaluated by Mulliken, natural population analysis (NPA), Hirschfeld and Voronoi deformation density (VDD) methods.
authors.affiliation: McMaster University, Department of Chemistry, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1. vargas@chemistry.mcmaster.ca
authors.forename: Ignacio
authors.initials: I
authors.lastname: Vargas-Baca
authors.forename: Michael
authors.initials: M
authors.lastname: Findlater
authors.forename: Adam
authors.initials: A
authors.lastname: Powell
authors.forename: Kalyan V
authors.initials: KV
authors.lastname: Vasudevan
authors.forename: Alan H
authors.initials: AH
authors.lastname: Cowley