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tautomerism

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tautomerism /tau·tom·er·ism/ (-izm) the relationship that exists between two constitutional isomers (those having the same atoms linked in different structures) that are in chemical equilibrium and freely change from one to the other.tautomer´ic
tau·tom·er·ism (tô-tm-rzm)
n.
Chemical isomerism in which the isomeric forms differ little, usually only in the position of a hydrogen atom, and are able to exist in equilibrium and react with each other.
tauto·meric (tôt-mrk) adj.
tautomerism [taw-tom´er-izm]
stereoisomerism in which the compounds are mutually interconvertible, under normal conditions, forming a mixture that is in dynamic equilibration. adj., adj tautomer´ic.
tautomerism
stereoisomerism in which the compounds are mutually interconvertible, under normal conditions, forming a mixture that is in dynamic equilibration.
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The photostabilization mechanism of hydroxybenzophenones is believed to be a rapid tautomerism of the excited states [8].
Influence of UV absorber on photodegradation processes of poly(vinyl ... by Shi, Wei; Zhang, Jun; Shi, Xu-Ming; Jiang, Guo-Dong / Polymer Engineering and Science
2) [19] [FIGURE 1 OMITTED] The alkylation of carbon in the ortho and para substitution occurs, however substitution in meta is exclusively not obvious, the phenol reacts with the methanal in the reaction of hydroxymethylation (figure 3) where the condensation aldol takes place but here the balance of tautomerism is in favour of the form phenol which is most stable due to its aromatic character.
Antibacterial activity of certain phenolic resins: effect of -OH and ... by Chaib, Messaoud; Miloudi, Safia / International Journal of Applied Chemistry
Because of tautomerism (hydrogen shifts within the molecule), xanthines such as caffeine appear to have phenolic structure, but the preferred chemical structure in xanthines is the ketone.
NUTRITION HOTLINE by HAVALA, SUZANNE / Vegetarian Journal
 
 
 
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