Volume 26, Issue 3 pp. 206-214
Article
Free to Read

A DFT Study on the Stability and Aromaticity of Heterobenzenes Containing Group 15 Elements

Iulia Păuşescu

Iulia Păuşescu

Faculty of Industrial Chemistry and Environmental Engineering, University Politehnica of Timişoara, 300006 Timişoara, România

Institute for Chemistry Timişoara of the Romanian Academy, 300223 Timişoara, România

Search for more papers by this author
Mihai Medeleanu

Corresponding Author

Mihai Medeleanu

Faculty of Industrial Chemistry and Environmental Engineering, University Politehnica of Timişoara, 300006 Timişoara, România

Correspondence to: Mihai Medeleanu; e-mail: [email protected].Search for more papers by this author
Mircea Ştefănescu

Mircea Ştefănescu

Faculty of Industrial Chemistry and Environmental Engineering, University Politehnica of Timişoara, 300006 Timişoara, România

Search for more papers by this author
Francisc Peter

Francisc Peter

Faculty of Industrial Chemistry and Environmental Engineering, University Politehnica of Timişoara, 300006 Timişoara, România

Search for more papers by this author
Raluca Pop

Raluca Pop

Faculty of Pharmacy, University of Medicine and Pharmacy “Victor Babeş” Timişoara, 300041 Timişoara, România

Search for more papers by this author
First published: 02 December 2014
Citations: 26

ABSTRACT

The stability and aromaticity of 36 heterobenzenes containing group 15 elements were evaluated at the B3LYP/6-311+G(d,p) level of theory. Stability evaluation was performed based on the enthalpies of formation calculated from imaginary reactions and on the absolute hardness reactivity descriptor. The aromaticity was investigated by means of geometric (Bird, Harmonic Oscillator Model of Aromaticity (HOMA) indices), energetic (aromatic stabilization energy), and magnetic criteria (nucleus-independent chemical shifts [NICS] index). Also, within the conceptual density functional theory (DFT) theory, reactivity-based descriptors (highest occupied molecular orbital and lowest unoccupied molecular orbital [HOMO—LUMO] energy gap, absolute hardness, electrophilicity) were computed. The results led to the conclusion that all heterobenzenes exhibit aromatic character, which generally decreases from N to As containing compounds and from one to six substituted CH groups.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.