page_title: Dicarbonyl
section_title: Hydration and cyclization
hierarchical_section_title: Dicarbonyl / Hydration and cyclization
caption_attribution_description: English: 2,5-Dihydroxytetrahydrofuran
context_page_description: A dicarbonyl is a molecule containing two carbonyl groups. Although this term could refer to any organic compound containing two carbonyl groups, it is used more specifically to describe molecules in which both carbonyls are in close enough proximity that their reactivity is changed, such as 1,2-, 1,3-, and 1,4-dicarbonyls. Their properties often differ from those of monocarbonyls, and so they are usually considered functional groups of their own. These compounds can have symmetrical or unsymmetrical substituents on each carbonyl, and may also be functionally symmetrical or unsymmetrical.
context_section_description: Succinaldehyde, glutaraldehyde, and adipaldehyde form hydrates, which cyclize.  Similar reactions apply to many dicarbonyls.
caption: 2,5-Dihydroxytetrahydrofuran, the hydrated form of succinaldehyde.
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