Title: Rare-gas insertion compounds of perfluorobenzene: Aromaticity of some unstable species
Authors: Baker, J ×
Fowler, PW
Soncini, Alessandro
Lillington, M #
Issue Date: Jan-2005
Publisher: Amer inst physics
Series Title: Journal of Chemical Physics vol:123 issue:17 pages:1-9
Article number: 174309
Abstract: Calculations on the novel argon insertion compounds C6F6Arn, n = 1 - 6, where the argon atoms are inserted into the C-F bonds in perfluorobenzene, suggest that all possible species, with one to six inserted argon atoms, occupy minima on their respective potential energy surfaces. Ring-current plots using the ipsocentric model indicate that there is no disruption of the aromatic pi system upon argon insertion, and consequently all insertion compounds are aromatic according to the magnetic criterion. The barrier height for decomposition of the single-insertion compound, C6F6Ar, into C6F6+Ar is 19.5 kcal/mol at HF/6-311G(**) and 29.5 kcal/mol at B3LYP/6-311G(**), suggesting that, although clearly thermodynamically unstable, argon-perfluorobenzene insertion compounds may be stable kinetically. Preliminary calculations indicate that other rare gas-perfluorobenzene insertion compounds may also be metastable. Both C6F6Ne and C6F6He are predicted to occupy minima on their respective potential energy surfaces. (c) 2005 American Institute of Physics.
ISSN: 0021-9606
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Quantum Chemistry and Physical Chemistry Section
× corresponding author
# (joint) last author

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