A form of isomerism in which a dynamic equilibrium between multiple isomers exists, such as that between an enol and a ketone.
See Also: tautomer

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  • Tautomerism — Tau*tom er*ism, n. [Gr. ?; ?, for ? ? the same + ? part.] (Chem.) The condition, quality, or relation of metameric substances, or their respective derivatives, which are more or less interchangeable, according as one form or the other is the more …   The Collaborative International Dictionary of English

  • tautomerism — tautomerism. См. таутомерия. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • tautomerism — [tô täm′ər iz΄əm] n. [< TAUTO + Gr meros, a part + ISM] Chem. the property of some substances of being in a condition of equilibrium between two isomeric forms and of reacting readily to form either tautomeric [tô΄tə mer′ik] adj …   English World dictionary

  • tautomerism — tautomeric /taw teuh mer ik/, adj. /taw tom euh riz euhm/, n. Chem. the ability of certain organic compounds to react in isomeric structures that differ from each other in the position of a hydrogen atom and a double bond. [1880 85; TAUTO +… …   Universalium

  • tautomerism — Form of isomerism in which there are two or more arrangements usually of hydrogens bonded to oxygen. Keto enol tautomerism is one common example. The balance between two coexisting tautomers may shift with time or as a result of changes in… …   Dictionary of molecular biology

  • tautomerism — tautomerija statusas T sritis chemija apibrėžtis Reiškinys, kai vienas tautomeras lengvai virsta kitu ir tarp jų nusistovi pusiausvyra. atitikmenys: angl. desmotropism; dynamic isomerism; tautomerism rus. десмотропия; динамическая изомерия;… …   Chemijos terminų aiškinamasis žodynas

  • tautomerism — tȯˈtäməˌrizəm noun ( s) Etymology: taut + merism : the phenomenon shown by a compound of behaving in chemical reactions as though the atoms in its molecule were arranged in more than one way expressible by different structural formulas, the two… …   Useful english dictionary

  • tautomerism — noun Date: circa 1890 isomerism in which the isomers change into one another with great ease so that they ordinarily exist together in equilibrium …   New Collegiate Dictionary

  • tautomerism — A phenomenon in which a chemical compound exists in two forms of different structure (isomers) in equilibrium, the two forms differing, usually, in the position of a hydrogen atom; e.g., keto enol t., R–CH2–C(O)–R′ ⇄ R–CH=C(OH)–R′. [G. tautos,… …   Medical dictionary

  • tautomerism — n. existence of one substance in various forms (Chemistry) …   English contemporary dictionary

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