Abstract Kinetic investigations of the reactions of (prop-2-enyl) dicarbonyl (cyclopentadienyl) iron complexes 1 with benzhydrylium ions 3, and of dicarbonyl (cyclopentadienyl)[(1, 2-η) propene] iron (II) tetrafluoroborate (9⋅ BF 4) with π-nucleophiles have been performed to elucidate the magnitude of the β-effect of the [(CO) 2 FeCp] group (Fp group). Introduction of the Fp group into the allylic position of propene and 2-methylpropene increases the ...
