CONTRASTING LIGAND PHOTOLABILISATIONS IN THE ACETYL COMPLEXES [(ETA(5)-C(5)R(5))FE(CO)(PPH(3))COME] (R=H, ME)

While the, primary photochemical process for [(eta(5)-C5H5)Fe(CO)(PPh(3))COMe] is exclusive loss of carbon monoxide to generate [(eta(5)-C5H5)Fe(Co)(PPh(3))Me], that for [(eta(5)-C(5)Me(5))Fe(CO)(PPh(3))COMe] is exclusive loss of triphenylphosphine to generate [(eta(5)-C(5)Me(5))Fe(CO)(2)Me].