Photolytic Reactions of (o-Allylbenzyl)dicarbonyl(η5-cyclopentadienyl)iron

Article abstract of DOI:10.1002/hlca.19920750415

Photolysis of (o-allylbenzyl)dicarbonyl(η⁵-cyclopentadienyl)iron (4) at 20 deg C in CH2Cl2 leads to carbon-monoxide loss followed by intramolecular complexation to <η²-(o-allylbenzyl)>carbonyl(η⁵-cyclopentadienyl)iron (13).At 50 deg C in C6D6, a photochemical rearrangement proceeds forming carbonyl (η⁵-cyclopentadienyl)<η³-<3-(2-methylphenyl)allyl>>iron (17).Depending on the temperature, photolysis of 4 leads to intermolecular reactions at the benzylic or allylic position of the ? complexes 13 and 17, respectively.