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- W2890765219 abstract "In the preceding paper, we examined the addition of nucleophiles to homosymmetric diradicals and showed that the reaction occurs with no symmetry restrictions or other electronic impediments. In this work, we examine the addition of nucleophiles to heterosymmetric diradicals, by using the addition of chloride to m-dehydrotoluene as a case study. Using CASPT2 and density functional theory calculations, we show that the addition of chloride to m-dehydrotoluene is predicted to be barrierless at the asymptotic limit if Cs symmetry is broken, and the reaction is allowed to proceed through a nonplanar geometry. A nonplanar cyclic allene acts as the transitioning structure between open-shell and closed-shell species for the addition of chloride, with a continuous and smooth changing of the wave function by the evolution of orbital and configuration interaction coefficients, such that there is no abrupt switch from diradical to closed-shell species along the reaction coordinate. The overall conclusion from our analysis is that both homosymmetric and heterosymmetric diradicals can undergo reaction with closed-shell reagents without a barrier, and one cannot rule out the direct addition of nucleophiles to diradicals when considering the reaction mechanism." @default.
- W2890765219 created "2018-09-27" @default.
- W2890765219 creator A5006427207 @default.
- W2890765219 creator A5054489541 @default.
- W2890765219 date "2018-09-10" @default.
- W2890765219 modified "2023-10-14" @default.
- W2890765219 title "Nucleophilic Addition to Singlet Diradicals: Heterosymmetric Diradicals" @default.
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- W2890765219 doi "https://doi.org/10.1021/acs.joc.8b01414" @default.
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