Substituent effects on the edge-to-face aromatic interactions

Eun Cheol Lee, Byung Hee Hong, Ju Young Lee, Jong Chan Kim, Dongwook Kim, Yukyung Kim, Tarakeshwar Pilarisetty, Kwang S. Kim

Research output: Contribution to journalArticle

175 Citations (Scopus)

Abstract

The edge-to-face interactions for either axially or facially substituted benzenes are investigated by using ab initio calculations. The predicted maximum energy difference between substituted and unsubstituted systems is ∼0.7 kcal/mol (∼1.2 kcal/mol if substituents are on both axially and facially substituted positions). In the case of axially substituted aromatic systems, the electron density at the para position is an important stabilizing factor, and thus the stabilization/destabilization by substitution is highly correlated to the electrostatic energy. This results in its subsequent correlation with the polarization and charge transfer. Thus, the stabilization/destabilization by substitution is represented by the sum of electrostatic energy and induction energy. On the other hand, the facially substituted aromatic system depends on not only the electron-donating ability responsible for the electrostatic energy but also the dispersion interaction and exchange repulsion. Although the dispersion energy is the most dominating interaction in both axial and facial substitutions, it is almost canceled by the exchange repulsion in the axial substitution, whereas in the facial substitution, together with the exchange repulsion it augments the electrostatic energy. The systems with electron-accepting substituents (NO2, CN, Br, Cl, F) favor the axial substituent conformation, while those with electron-donating substituents (NH2, CH3, OH) favor the facial substituent conformation. The interactions for the T-shape complex systems of an aromatic ring with other counterpart such as H2, H2O, HCl, and HF are also studied.

Original languageEnglish (US)
Pages (from-to)4530-4537
Number of pages8
JournalJournal of the American Chemical Society
Volume127
Issue number12
DOIs
StatePublished - Mar 30 2005
Externally publishedYes

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Static Electricity
Substitution reactions
Electrons
Electrostatics
Conformations
Ion exchange
Stabilization
Benzene
Carrier concentration
Charge transfer
Large scale systems
Polarization

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Lee, E. C., Hong, B. H., Lee, J. Y., Kim, J. C., Kim, D., Kim, Y., ... Kim, K. S. (2005). Substituent effects on the edge-to-face aromatic interactions. Journal of the American Chemical Society, 127(12), 4530-4537. https://doi.org/10.1021/ja037454r

Substituent effects on the edge-to-face aromatic interactions. / Lee, Eun Cheol; Hong, Byung Hee; Lee, Ju Young; Kim, Jong Chan; Kim, Dongwook; Kim, Yukyung; Pilarisetty, Tarakeshwar; Kim, Kwang S.

In: Journal of the American Chemical Society, Vol. 127, No. 12, 30.03.2005, p. 4530-4537.

Research output: Contribution to journalArticle

Lee, EC, Hong, BH, Lee, JY, Kim, JC, Kim, D, Kim, Y, Pilarisetty, T & Kim, KS 2005, 'Substituent effects on the edge-to-face aromatic interactions', Journal of the American Chemical Society, vol. 127, no. 12, pp. 4530-4537. https://doi.org/10.1021/ja037454r
Lee, Eun Cheol ; Hong, Byung Hee ; Lee, Ju Young ; Kim, Jong Chan ; Kim, Dongwook ; Kim, Yukyung ; Pilarisetty, Tarakeshwar ; Kim, Kwang S. / Substituent effects on the edge-to-face aromatic interactions. In: Journal of the American Chemical Society. 2005 ; Vol. 127, No. 12. pp. 4530-4537.
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