Correlation between bowl-inversion energy and bowl depth in substituted sumanenes

Binod Babu Shrestha, Sangita Karanjit, Shuhei Higashibayashi, Hidehiro Sakurai

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


The correlation between the bowl-inversion energy and the bowl depth for sumanenes monosubstituted with an iodo, formyl, or nitro group was investigated experimentally and by theoretical calculations. The bowl-inversion energies of the substituted sumanenes were determined experimentally by two-dimensional NMR exchange spectroscopy measurements. Various density functional theory methods were examined for the calculation of the structure and the bowl-inversion energy of sumanene, and it was found that PBE0, wB97XD, and M06-2X gave better fits of the experimental value than did B3LYP. The experimental value was well reproduced at these levels of theory. The bowl structures and bowl-inversion energies of monosubstituted sumanenes were therefore calculated at the wB97XD/6-311+G(d,p) level of theory. In both the experiments and the calculations, the correlation followed the equation E = acos4θ , where a is a coefficient, E is the bowl-inversion energy, and cos θ is the normalized bowl depth, indicating that the bowl inversion follows a double-well potential energy diagram.

Original languageEnglish
Pages (from-to)747-753
Number of pages7
JournalPure and Applied Chemistry
Issue number5
Publication statusPublished - 2014 May
Externally publishedYes


  • Aromatic compounds
  • Bowl inversion
  • Buckybowls
  • NMS-IX
  • Organic chemistry
  • Polycyclic aromatics

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering


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