Definition of Hemiacetal

1. Noun. An organic compound usually formed as an intermediate product in the preparation of acetals from aldehydes or ketones.

Generic synonyms: Organic Compound



Definition of Hemiacetal

1. Noun. (chemistry) Any of a class of compounds of general formula R2C(OH)OR' (where R' is not H). ¹

¹ Source: wiktionary.com

Definition of Hemiacetal

1. [n -S]

Medical Definition of Hemiacetal

1. RCH(OH)OR', a product of the addition of an alcohol to an aldehyde (an acetal is formed by the addition of an alcohol to a hemiacetal). In the aldose sugars, the hemiacetal formation is internal and labile, brought about by the 4-OH or 5-OH attack on the carbonyl O, yielding the furanose or pyranose structures; the hemiacetal forms of the sugars are involved in all polysaccharides, as glycosyls or glycosides. See: hemiketal, acetal. (05 Mar 2000)

Hemiacetal Pictures

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Lexicographical Neighbors of Hemiacetal

hemerobian
hemerobians
hemerobid
hemerobiid
hemerobiid fly
hemerobiids
hemerocallis
hemerocallises
hemerophyte
hemerophytes
hemerythrin
hemerythrins
hemes
hemi-
hemiacardius
hemiacetal (current term)
hemiacetalic
hemiacetals
hemiageusia
hemiageustia
hemialbumin
hemialbumose
hemialbumoses
hemialgia
hemialgias
hemiaminal
hemiaminals
hemianaesthesia
hemianalgesia

Literary usage of Hemiacetal

Below you will find example usage of this term as found in modern and/or classical literature:

1. Journal of the American Chemical Society by American Chemical Society (1915)
"Both of these observations can be explained by the formation of a di- hemiacetal, but more experiments are necessary before this explanation is accepted. ..."

2. Technology Quarterly and Proceedings of the Society of Arts by Massachusetts Institute of Technology, Society of Arts (1896)
"... in order to determine the conditions necessary for making substances of this class. These experiments, together with a new hemiacetal from ..."

3. Technology Quarterly and Proceedings of the Society of Arts by Massachusetts Institute of Technology, Society of Arts (1895)
"The instability of the compounds and their salts is further evidence. By the action of ethyl iodide on the silver salt of the hemiacetal a tetraethyl- ..."

4. Technology Quarterly by Massachusetts Institute of Technology (1896)
"... in order to determine the conditions necessary for making substances of this class. These experiments, together with a new hemiacetal from ..."

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