Possible D6h structures in neutral and negatively-charged cyclic polyenes

Kazunari Yoshizawa, Takashi Kato, Tokio Yamabe

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1 Citation (Scopus)


The geometrical and electronic structures of large cyclic polyenes, annulenes, and their tetraanions are studied using the MNDOC method coupled with a conventional perturbation treatment. It is clarified that in neutral [18]annulene the D6h structure is 6.4 kcal/mol more favorable, but in neutral [30]annulene the D6h structure is less stable by 4.6 kcal/mol. Moreover, in neutral [42], [54], and [66]annulenes the D3h structures are clearly more stable than the corresponding D6h ones, and in the tetraanion of [18]annulene the D6h structure is more favorable.

Original languageEnglish
Pages (from-to)2397-2398
Number of pages2
JournalSynthetic Metals
Issue number1-3
Publication statusPublished - Feb 28 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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