[¦a‚nī·ə′nä·trə·pē] (chemistry) The breaking off of an ion such as hydroxyl or bromide from a molecule so that a positive ion remains in a state of dynamic equilibrium.
anionotropy
an·i·on·ot·ro·py
(an'-ī-on-ot'rō-pē), The migration of a negative ion in tautomeric changes.