As a catalyst, Iron(III) 2-ethylhexanoate can be used in wide range of polymerization reaction. It has been used as a mild Lewis acid catalyst for the stereoselective Diels-Alder reaction as wel as in a Ziegler-Natta type catalyst system for the polymerization of 1,3-butadiene.Iron(III) 2-ethylhexanoate is used as a catalyst used in polymerization reactions. It also serves as a mild Lewis acid catalyst for the stereoselective Diels-Alder reaction. Further, it acts as Ziegler-Natta type catalyst system involved in the polymerization of 1,3-butadiene.