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Barrera, Yoshio; Anderson, James S. M.
Journal of computational chemistry, May 30, 2024, Volume: 45, Issue: 14Journal Article
The reactivity of 22 unsaturated molecules undergoing attack by a methyl radical (⋅CH3) have been elucidated using the condensed radical general‐purpose reactivity indicator (condensed radical GPRI) appropriate for relatively nucleophilic or electrophilic molecules. Using the appropriate radical GPRI equation for electrophilic attack or nucleophilic radical attack, seven different population schemes were used to assign the most reactive atoms in each of the 22 molecules. The results show that the condensed radical GPRI is sensitive to the population scheme chosen, but less sensitive than the radical Fukui function. Therefore, the reliability of these methods depends on the population scheme. Our investigation indicates that the condensed radical GPRI is most accurate in predicting the dominant products of the methyl radical addition reactions on a variety of unsaturated molecules when the Hirshfeld, Merz–Singh–Kollman, or Voronoi deformation density population schemes are used. Furthermore, for all populations schemes in the majority of instances where the radical Fukui function failed the radical GPRI was able to identify the most reactive atom under certain reactivity conditions. The reactivity of 22 unsaturated molecules undergoing attack by a methyl radical (⋅CH3) have been elucidated using the condensed radical general‐purpose reactivity indicator (condensed R‐GPRI) appropriate for relatively nucleophilic or electrophilic radicals. The results show that the condensed R‐GPRI and the condensed radical Fukui function are sensitive to the population scheme chosen. The Hirshfeld, Merz–Singh–Kollman (MSK), and Voronoi deformation density (VDD) population schemes are found to be the most reliable in predicting the most likely atom to undergo radical attack in a molecule using the R‐GPRI.
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