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tautomer Syllabification: tau·to·mer
Pronunciation: /ˈtôdəmər/

Definition of tautomer in English:


Each of two or more isomers of a compound that exist together in equilibrium, and are readily interchanged by migration of an atom or group within the molecule.
Example sentences
  • These structures are called tautomers, which exist in dynamic equilibrium with each other.
  • Earlier studies also support the fact that phenolic compounds could convert to different tautomers, quinone, ketone and dimers at higher pH in the presence of oxidative species.
  • In our previous study on vibrational relaxation in HRP the relaxation time varied in the range of 1-10 ps for different vibrational modes of pyrrole tautomers of the chromophore.


Pronunciation: /ˌtôtəˈmerik/
Example sentences
  • That is, regardless of the tautomeric form in which the molecule finds itself there is always conserved an aromatic core to which is attached a hydroxyl group peri to a carbonyl group.
  • Point mutations, for example, can be due to tautomeric shift (a movement of hydrogen atoms that changes the properties of bonding).
  • This is corroborated by the fact that the interconversion between A 1 and A 3 is very fast at room temperature, which cannot be explained by a simple tautomeric conversion.
Pronunciation: /tôˈtäməˌrizəm/
Example sentences
  • This is tautomerism, where two isomers exist in dynamic equilibrium with each other.
  • The same is true of tautomerism in aromatic molecules.
  • As explained earlier, curcumin exists in keto-enol tautomerism; these tautomeric equilibria both in the ground and in the excited states can be influenced by the solvent protons.


Early 20th century: blend of tauto- 'same' and isomer.

Definition of tautomer in:
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