Considering the definition of iteroselectivity proposed herein that concerns repeating chemical transformation on the same chemical function, iteroselectivity is fundamentally different from chemoselectivity that concerns the selectivity between different chemical functions. A lack of chemoselectivity in a potential iterative reaction would lead to side products which are out iterative process studied (Figure ). iteroselectivity and chemoselectivity differ to such an extent that they cannot be used in a concerted manner to describe the products of a reaction as opposed to the complementarity between iteroselectivity and regio-or stereoselectivity discussed above.