Abstract
It has been shown by empirical, semiempirical, and nonempirical methods that the interconversion of the rings of 1,3,2-dioxaborinanes goes via transition state with the 2,5-twist form and differs from the monotypic substituted 1,3-dioxanes in having a lower potential barrier.
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Kuznetsov, V.V., Novikov, A.N. Pseudorotation and Barriers to Inversion of 1,3,2-Dioxaborinane Rings. Chemistry of Heterocyclic Compounds 39, 263–266 (2003). https://doi.org/10.1023/A:1023788912799
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DOI: https://doi.org/10.1023/A:1023788912799