Chemical reactivity from an activation strain perspective.

Area of Science:

• Chemistry
• Computational Chemistry
• Physical Chemistry

Background:

• Chemical reactions are fundamental to life and industry.
• Understanding reaction mechanisms and reactivity is crucial.
• Computational chemistry offers significant insights into chemical processes.

Purpose of the Study:

• To highlight the power of the activation strain model in understanding chemical reactivity.
• To demonstrate the connection between molecular structure and reactivity.
• To showcase the application of the activation strain model in various chemical transformations.

Main Methods:

• Utilizing the activation strain model to evaluate the relative energy of interacting reactants.
• Analyzing the reaction energy profile along with reactant rigidity and stabilizing interactions.
• Connecting the activation strain model with Kohn-Sham molecular orbital theory.

Main Results:

• The activation strain model quantifies reactivity based on reactant deformation and interaction energies.
• A causal relationship is established between reactant sterics/electronics and reactivity.
• The model provides a deeper understanding beyond phenomenological explanations.

Conclusions:

• The activation strain model is a powerful tool for elucidating fundamental organic reactions.
• It is effective in studying the activation of small molecules by metallylenes.
• The model aids in understanding the cycloaddition reactivity of dienes and dipolarophiles.