1,3-Dioxane 2026-10-20
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1,3-Dioxane is a six-membered ring with oxygen at positions 1 and 3. It commonly adopts chair conformations. Axial substituent penalties differ sharply between C2 and C5 because the relevant 1,3 contacts involve different ring atoms.
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Carbon-13 magnetic resonance. Conformation in some tert-butyl-1,3-dioxanes by Alan J. Jones and others 2026-10-20
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Journal of the American Chemical Society 93, 4772–4777. Discussion of cis-2-methyl-5-tert-butyl-1,3-Dioxane and its axial C5 tert-butyl substituent.
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