interconversion

/IH0 N T ER0 K AH0 N V ER1 ZH AH0 N/
noun
  1. 1

    Reciprocal or mutual conversion.

    โ€œTautomerism is chemical isomerism characterized by relatively easy interconversion of isomeric forms in equilibrium.โ€

Source: https://en.wiktionary.org/wiki/interconversion