Abstract
Treatment of the n6-o-dichlorobenzene-n 5-cyclopentadienyliron hexafluorophosphate with 3 molar equivalent of K2CO3 in nitroethane or nitromethane gives corresponding o-ClC,6H4 CH(R)NO2 FeCp+PF6 (R = CH3 or H) complexes in excellent yields.