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Chemical isomerism characterized by facile interconversion of isomeric forms in equilibrium, especially by migration of a hydrogen atom.

tau′to·mer (tô′tə-mər) n.
tau′to·mer′ic (tô′tə-mĕr′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Elements & Compounds) either of the two forms of a chemical compound that exhibits tautomerism
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References in periodicals archive ?
5-bromo uracil has a greater tendency towards tautomerization as compared to uracil.
The keto-enol tautomerization can be represented as followings:
A process has been developed by which terminal alkynes undergo Markovnikov hydration followed by tautomerization without the use of a mercury catalyst.
assumed that the reason of inequality in the formed peaks is due to (i) racemization of L-TPC during the derivatization reaction, (ii) kinetic resolution of the two enantiomers, and (iii) the difference in diastereoisomers' yields which were explained in terms of keto-enol tautomerization of the analytes.
tautomerization reactions, Waddington reactions etc.).
The IR spectrum shows appearance of absorption band of C=O group for the amide at 1691 [cm.sup.-1], as well as the presence of OH-NH tautomerization at [delta] 7.1 ppm and 12 ppm.
Tridimensional structures of these two ligands, tautomerization and ionization at pH 7.4, were obtained by launching the LigPrep task of Schrodinger[C] Maestro.
Other reactions are mediated by tyrosinase-related protein (TRP1) and dopachrome tautomerase (DCT) that catalyze the tautomerization of indolene-2-carboxylic acid-5, 6-quinone or dopachrome and oxidation of 5,6-dihydroxylindole-2-carboxylic acid, respectively [10].
By tautomerization of precursors of the product 5 an imine intermediate was formed.
The molecular structures of PSTM-3T polymer were modeled at different pH conditions with consideration of tautomerization and dissociation.