Ab initio CASSCF and MRSDCI calculations of the (C6H6)+2 radical

Eisaku Miyoshi, Tetsuya Ichikawa, Tomonari Sumi, Yoshiko Sakai, Norihiro Shida

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Abstract

Ab initio complete active space self-consistent field (CASSCF) and multireference singly and doubly excited configuration interaction (MRSDCI) calculations were performed for the (C6H6)+2 radical. The calculations revealed that the global minima of the ground state of (C6H6)+2 are at distorted C2h geometries. Sandwich (D6h) and T-shaped (C2v) structures are higher in energy than the minima by 0.4 and 3.7 kcal/mol, respectively. The calculated binding energy is 15.0 kcal/mol compared with an observed value of 20.6 ± 1.0 kcal/mol. The excitation energies of low-lying excited states are discussed.

Original languageEnglish
Pages (from-to)404-408
Number of pages5
JournalChemical Physics Letters
Volume275
Issue number3-4
Publication statusPublished - Aug 29 1997
Externally publishedYes

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

Miyoshi, E., Ichikawa, T., Sumi, T., Sakai, Y., & Shida, N. (1997). Ab initio CASSCF and MRSDCI calculations of the (C6H6)+2 radical. Chemical Physics Letters, 275(3-4), 404-408.