tautomerism

noun Chemistry.

1. 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.

noun

1. the ability of certain chemical compounds to exist as a mixture of two interconvertible isomers in equilibriumSee also keto-enol tautomerism

n.

1. Chemical isomerism in which the isomeric forms differ little, usually only in the position of a hydrogen atom, and are able to exist in equilibrium and react with each other.