A first principle study of Nitrogen/Carbon replacement in a set of β-aminoacrolein/β-thioaminoacrolein derivatives

IF 3 3区化学 Q3 CHEMISTRY, PHYSICAL Computational and Theoretical Chemistry Pub Date : 2025-02-01 DOI:10.1016/j.comptc.2024.115053

Malihe Shahraki, Alireza Nowroozi, Ebrahim Nakhaei

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Abstract

This study systematically investigates the impact of N/C substitution in β-aminoacrolein/β-thioaminoacrolein derivatives at various theoretical levels. Key electronic energy components, including electron configuration, nitrogen atom positioning, lone pair-lone pair (Lp-Lp) repulsion, and resonance-assisted hydrogen bonding (RAHB), are evaluated. Results reveal that electron configuration contributes the most stabilizing energy (∼-16 Hartree), while nitrogen positioning and Lp-Lp repulsions destabilizes structures, following the trend: N2 < N1 < N3. RAHB energies are strongly influenced by nitrogen count, with stability improving in the order: N1 (−0.0145) < N2 (−0.0273) < N3 (−0.0370) < N1N2 (−0.0418) < N1N3 (−0.0515) < N2N3 (−0.0643) < N1N2N3 (-0.0788H). Furthermore, energetic, structural, spectral, and topological descriptors support these findings. Interestingly, the aromaticity index indicates a slight reduction in π-electron delocalization (π-ED) with N/C substitution, challenging conventional RAHB theory.

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来源期刊

Computational and Theoretical Chemistry CHEMISTRY, PHYSICAL-

CiteScore

4.20

自引率

10.70%

发文量

331

审稿时长

31 days

期刊介绍： Computational and Theoretical Chemistry publishes high quality, original reports of significance in computational and theoretical chemistry including those that deal with problems of structure, properties, energetics, weak interactions, reaction mechanisms, catalysis, and reaction rates involving atoms, molecules, clusters, surfaces, and bulk matter.