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Structure, bonding, and energetics of C<sub>7</sub><sup>2 - </sup> isomers

J. Chem. Phys. 109, 87 (1998); doi:10.1063/1.476543

Issue Date: 1 July 1998

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O. Dolgounitcheva, V. G. Zakrzewski, and J. V. Ortiz
Department of Chemistry, Kansas State University, Manhattan, Kansas 66506-3701
Several isomers of C<sub>7</sub><sup>2 - </sup> were studied with electron correlation methods and augmented, correlation-consistent basis sets. All are thermodynamically stable with respect to dissociation into C<sub>5</sub><sup> - </sup> and C<sub>2</sub><sup> - </sup> anions. Isomerization energies are less than 5 kcal/mol at the highest level of theory. Vertical and adiabatic electron detachment energies are positive for the D3h form of C<sub>7</sub><sup>2 - </sup>. Linear, carbene, bridged-chain, and chain-ring isomers are considered as well. Feynman–Dyson amplitudes connecting dianionic and anionic states reveal extensive delocalization of the least bound electrons. ©1998 American Institute of Physics.
History: Received 5 February 1998; accepted 27 March 1998
Permalink: http://link.aip.org/link/?JCPSA6/109/87/1
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KEYWORDS and PACS

Keywords
PACS
  • 36.40.Mr
    Studies of special atoms, molecules, and their ions; clusters Atomic and molecular clusters Spectroscopy and geometrical structure of clusters
  • 33.15.Bh
    Molecular properties and interactions with photons Properties of molecules and molecular ions General molecular conformation and symmetry; stereochemistry
  • 82.30.Qt
    Physical chemistry Specific chemical reactions; reaction mechanisms Isomerization and rearrangement
  • 33.15.Hp
    Molecular properties and interactions with photons Properties of molecules and molecular ions Barrier heights (internal rotation, inversion, rotational isomerism, conformational dynamics)
  • 31.25.Qm
    Electronic structure of atoms, molecules and their ions: theory Electron correlation calculations for atoms and molecules Electron-correlation calculations for polyatomic molecules
  • YEAR: 1998

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ISSN:
0021-9606 (print)   1089-7690 (online)
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