Synthesis, fluorophilicities and regioisomer composition of ferrocenes and rhodium complexes based on bis(polyfluoroalkylated) cyclopentadienes

Ferrocenes and rhodium(I) carbonyl complexes were synthesized from lithium bis[2-(perfluoroalkyl)ethyl]cyclopentadienides and ferrous chloride–THF complex or tetracarbonyldichlorodirhodium. Fluorophilicities of starting bis[2-(perfluoroalkyl)ethyl]cyclopentadienes and ferrocenes made there from were determined. Four regioisomers of bis[2-(perfluoroalkyl)ethyl]cyclopentadienes, three regioisomers of the corresponding ferrocenes and two regioisomers of the corresponding rhodium complexes were identified and their ratio determined by 1D and 2D NMR spectroscopy.