PREPARATION AND REACTIONS OF CYCLOPENTADIENYLDICARBONYLIRON

Article abstract of DOI:10.1016/S0022-328X(00)87081-3

Although , (Fp=η-C5H5Fe(CO)2) (I) is stable and characterizable, the lower homologue FpCH2CH(CO2CH3)2 (II) is not; this we attribute to a facile elimination reaction resulting from the reactively acidic β-hydrogen of II.Formation of I from Fp^- and XCH2CE2CH3 (X=Br, Cl; E=CO2CH2CH3) and cleavage of its Fe-C bonds (using H⁺, Br2, Ce^IV and Hg^II) occur without major amounts of ester group migrations, even though CH2CE2CH3 radicals are involved in some of these reactions.