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 conditions.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • 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 — 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 — noun 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 …   Wiktionary

  • 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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