title: β-Technetium trichloride: formation, structure, and first-principles calculations.
abstract: A second polymorph of technetium trichloride, β-TcCl(3), has been identified from the reaction between Tc metal and Cl(2) gas. The structure of β-TcCl(3) consists of infinite layers of edge-sharing octahedra, similar to its MoCl(3) and RuCl(3) analogues. The Tc-Tc distance [2.861(3) Å] between adjacent octahedra is indicative of metal-metal bonding. Earlier theoretical work predicted that β-TcCl(3) is less stable than α-TcCl(3). In agreement with the prediction, β-TcCl(3) slowly transforms into α-TcCl(3) (Tc(3)Cl(9)) over 16 days at 280 °C.
authors.affiliation: Department of Chemistry, University of Nevada at Las Vegas, Las Vegas, Nevada 89154, USA. poineauf@unlv.nevada.edu
authors.forename: Frederic
authors.initials: F
authors.lastname: Poineau
authors.forename: Erik V
authors.initials: EV
authors.lastname: Johnstone
authors.forename: Philippe F
authors.initials: PF
authors.lastname: Weck
authors.forename: Paul M
authors.initials: PM
authors.lastname: Forster
authors.forename: Eunja
authors.initials: E
authors.lastname: Kim
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Czerwinski
authors.forename: Alfred P
authors.initials: AP
authors.lastname: Sattelberger