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In organic chemistry, a hemiacetal is a functional group the general formula R 1 R 2 C(OH)OR, where R 1, R 2 is a hydrogen atom or an organic substituent. They generally result from the nucleophilic addition of an alcohol (a compound with at least one hydroxy group ) to an aldehyde ( R−CH=O ) or a ketone ( R 2 C=O ) under acidic conditions.
Pages in category "Hemiacetals" The following 2 pages are in this category, out of 2 total. This list may not reflect recent changes. H. Hemiacetal; P. Paraformaldehyde
There are two functionally different classes of disaccharides: Reducing disaccharides, in which one monosaccharide, the reducing sugar of the pair, still has a free hemiacetal unit that can perform as a reducing aldehyde group; lactose, maltose and cellobiose are examples of reducing disaccharides, each with one hemiacetal unit, the other occupied by the glycosidic bond, which prevents it from ...
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This reaction converts anhydroglucopyranoside subunits to cyclic hemiacetal structures, which can be reacted with amine groups to form a Schiff base linkage (a carbon-nitrogen double bond). These linkages are unstable and will easily dissociate. Sodium cyanoborohydride (NaBH 3 CN) can be used as a stabilizer by reducing the linkages back to an ...
Russian President Vladimir Putin praised U.S. President-elect Donald Trump on Thursday as an experienced and intelligent politician, but said he did not believe Trump was safe after attempts on ...
Holiday preparations are in full swing, and no one wants to be on the “bad” list this time of year. When it comes to our legal climate, however, Louisiana has managed just that, even after ...