Efficient Reaction Space Exploration with ChemTraYzer-TAD.

Area of Science:

• Computational Chemistry
• Chemical Kinetics
• Molecular Dynamics

Background:

• Reaction modeling is crucial but time-consuming, especially for unknown reactions.
• Automated methods for reaction space exploration are highly sought after.

Purpose of the Study:

• To introduce ChemTraYzer-TAD, a novel reactive molecular dynamics acceleration technique.
• To enable efficient exploration of chemical reaction spaces.

Main Methods:

• ChemTraYzer-TAD utilizes a basin confinement strategy similar to temperature-accelerated dynamics (TAD).
• It integrates ChemTraYzer bond-order processing for automatic, on-the-fly determination of virtual walls.
• The method confines systems within potential energy basins for accelerated dynamics.

Main Results:

• ChemTraYzer-TAD identified over 100 parallel reactions for 1,3-dioxolane-4-hydroperoxide-2-yl radical oxidation in under 2 ns.
• The method successfully found typical low-temperature reactions despite simulation temperatures up to 5000 K.
• A new concerted β-scission plus O2 addition pathway with a lower barrier was discovered.

Conclusions:

• ChemTraYzer-TAD significantly enhances the efficiency of reaction space exploration in molecular dynamics.
• The technique is capable of discovering known and novel reaction pathways under extreme conditions.
• This method offers a powerful tool for computational chemists studying complex reaction mechanisms.