A New Index for the Estimation of the Aromatic Character - IX

Title:A New Index for the Estimation of the Aromatic Character - IX

Volume: 13 Issue: 1

Author(s): Maurizio D`Auria*

Affiliation:

• Dipartimento di Scienze, Università della Basilicata, Viale dell'Ateneo Lucano 10, 85100 Potenza,Italy

Keywords: Aromatic stabilization energy, aromaticity, DFT calculations, experimental resonance energy, functionals, π orbitals.

Abstract: Background: Recently, the author of the article proposed a new index for the estimation of the aromatic character. The aromaticity index D, D usually obtained by using DFT/B3LYP/6-311G+(d,p) theoretical method.

Method: The D index was tested using different functionals: LSDA, BVP86, B3LYP, CAM-B3LYP, B3PW91, mPW1PW91, PBEPBE, HSE1PBE, HCTH, TPSSTPSS, and wB97XD.

Results: The results showed that the D values for monocyclic aromatic compounds are not largely sensible to the variation of the functional. Large variations of D values were observed for polycyclic aromatic compounds. D values were correlated to ERE (experimental resonance energy) and ASE (aromatic stabilization energy). ERE and ASE gave different correlations with D.

Conclusion: The best correlation between D and ERE was obtained by using CAM-B3LYP. The best correlation between D and ASE was obtained by using CAM-B3LYP.

Cite this article as:

D`Auria Maurizio*, A New Index for the Estimation of the Aromatic Character - IX, Letters in Organic Chemistry 2016; 13 (1) . https://dx.doi.org/10.2174/157017861301151202101846