“…The use of iron complexes as homogeneous catalysts in hydrogenation, transfer hydrogenation, and hydrosilylation is reviewed emphasizing the potential of iron as a future catalyst. 349 Studies made by Casey et al, 350 Morris, 351 and Milstein, 352 who used iron as the well-defined catalysts for the hydrogenation of ketones, are highlighted in an article along with the detailed mechanism for the [Fe(Br)(CO)(H)(PNP-Pr i )]catalysed hydrogenation of ketones to alcohols in ethanol. 353 In all these cases, strong-field tri-and tetra-dentate ligands (and sometimes also CO ligands) were needed to maintain the iron in a low spin state.…”