ArticleMolecules (Basel, Switzerland)2025
Substituent Effects in the Thermal Decomposition of 1,2,4-Triazol-3(2H)-Ones and Their Thione Analogues: A DFT Study with Functional Performance.
Article in Molecules (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Study of the Gas-Phase Pyrolysis of N-Aryl-3-Oxobutanamides and the 2-Aryl Hydrazone Derivatives: A Novel Computational Approach Including DFT with Multivariant Analysis.Molecules (Basel, Switzerland) · 2026Article
- Advancing the Frontiers: Contemporary Achievements and Future Directions in Density Functional Theory Calculations.Molecules (Basel, Switzerland) · 2026Article
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Abstract
This computational study investigates the thermal decomposition of 1,2,4-triazol-3(2H)-ones and their thione analogues using Density Functional Theory (DFT). The reaction proceeds via a concerted, six-membered cyclic transition state, primarily driven by the breaking of the N-N bond. A key finding is that the accuracy of the calculated activation energies (Ea) strongly depends on the choice of DFT functional. For sulfur-containing systems (thiones), the hybrid functional APFD (with 25% Hartree-Fock exchange) provides the most reliable results, effectively describing their higher polarizability. In contrast, for oxygen-containing systems (triazolones), the dispersion-corrected functional B97D-GD3BJ (with 0% Hartree-Fock exchange) delivers superior accuracy by better modeling electrostatic and dispersion interactions. The -CH
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