Investigation of the stereochemistry of iron-carbon.alpha. bond cleavage when phenylcyclopropane is generated by .gamma.-ionization of stereospecifically deuterated C5H5(CO)2FeCHDCHDCH(OCH3)C6H5 complexes. A transition-state model for transfer of the carbene ligand from C5H5(CO)2Fe:CHR+ to alkenes | Synapse