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tautomerism

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tau·tom·er·ism  (tô-tm-rzm)
n.
Chemical isomerism characterized by relatively easy interconversion of isomeric forms in equilibrium.
[tauto- + (iso)merism.]
tauto·mer (tôt-mr) n.
tauto·meric (tôt-mrk) adj.
tautomerism [tɔːˈtɒməˌrɪzəm]
n
(Chemistry) the ability of certain chemical compounds to exist as a mixture of two interconvertible isomers in equilibrium See also keto-enol tautomerism
[from tauto- + isomerism]
tautomeric  [ˌtɔːtəˈmɛrɪk] adj
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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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