title: Communication: Revised electron affinity of SF6 from kinetic data.
abstract: Previously determined experimental data for thermal attachment of electrons to SF(6) and thermal detachment from SF(6)(-) over the range 590-670 K are reevaluated by a third-law analysis. Recent high precision calculations of SF(6)(-) harmonic frequences and anharmonicities (for several of the modes) lead to considerable changes in modeled vibrational partition functions which then have to be accommodated for by a smaller value of the derived adiabatic electron affinity EA of SF(6). The previously estimated value of EA = 1.20 (±0.05) eV in this way is reduced to a value of EA = 1.03 (±0.05) eV. In addition, the bond dissociation energy E(0,dis) for SF(6)(-) → SF(5)(-) + F is reduced to E(0,dis) = 1.44 (±0.05) eV. Finally, the consequences for modeled specific rate constants k(det)(E,J) of electron detachment from SF(6)(-) are discussed.
authors.affiliation: Institut für Physikalische Chemie, Universität Göttingen, Tammannstrasse 6, D-37077 Göttingen, Germany. shoff@gwdg.de
authors.forename: Jürgen
authors.initials: J
authors.lastname: Troe
authors.forename: Thomas M
authors.initials: TM
authors.lastname: Miller
authors.forename: Albert A
authors.initials: AA
authors.lastname: Viggiano
mesh_terms: D004583:Electrons; D007700:Kinetics; D013058:Mass Spectrometry; D008956:Models, Chemical; D011789:Quantum Theory; D013696:Temperature