Ferrocene is one of the organometallic compounds formed by two cyclopentadienyl anions (C5H5-) co-ordinated to Fe. Its formula is Fe(C5H5)2. This compound was first synthesized in the early 1950’s and takes a “sandwich” structure where the iron atom is in the middle of and covalently bonded to two identical, flat, paralleled cyclopentadienyl rings. Ferrocene itself is relatively inert and displays most of the characteristics of an aromatic compound. Because of its stability and peculiar structure of bonds it can be used in organic synthesis, catalysis and materials science.