Organometallic complexes with electron bridges. 7. Electrochemical, spectroscopic, and structural studies of mono- and bimetallic complexes of iron: x-ray crystal structures of CpFe(CO)2-C6F5, 4-CpFe(CO)2-C5F4N, and 1,4-C6F4(CpFe(CO)2)2 - Simon Bott (Organometallics, 1992)