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tautomerism

Pronunciation: taw-tom'er-izm

Definition: 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; keto-enol tautomerism, R–CH2–C(O)–R' ? R–CH=C(OH)–R'.

[G. tautos, the same, + meros, part]

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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