“…The HPLC behavior of a variety (26 compounds) of ring-substituted ferrocene derivatives, including two pairs of diastereoisomers,27 has been studied under normal-phase conditions. The geometrical isomers cis-and trans-4- HX/D NP UV 39 56 mono-and bissubstituted derivatives °Fc = ferrocenyl; Cp* = pentamethylcyclopentadienyl; Cp' = substituted cyclopentadienyl (RR'C5H3). 6DC = 2,2'-dicyanodiethyl ether.…”