This thesis mainly describes the isomerization of allylic and homo-allylic alcohols to the corresponding carbonyl compounds in the presence of inexpensive transition metal complexes. [Fe(PNP)(CO)HCl] (PNP=di-(2-diisopropylphosphanyl-ethyl)amine), activated in situ with KOtBu, is a highly active catalyst for the isomerization of allylic and homo-allylic alcohols to ketones without an external hydrogen supply. High reaction rates were obtained at 80 oC, but the catalyst is also sufficiently active at room temperature with most substrates.