KETO COMPLEXES FROM THE OXIDATION OF η6-XANTHENE OR THIOXANTHENE-η5-CYCLOPENTADIENYLIRON CATION AND SOME REACTIONS OF THE FLUORENONE AND XANTHONE COMPLEXES

Article abstract of DOI:10.1016/0022-328X(84)80171-0

Ligand exchange between xanthene and ferrocene gave the η⁶-xanthene-η⁵-cyclopentadienyliron cation which was oxidized in situ with KMnO4 to give the η⁶-xanthone-η⁵-cyclopentadienyliron cation (III).Similar oxidation of the η⁶-thioxanthene-η⁵-cyclopentadienyliron cation gave a mixture of the thioxanthone complex IV and the corresponding complexed sulfone V.III and the η⁶-fluorenone-η⁵-cyclopentadienyliron cation (VI) were utilized as reactants in the synthesis of new complexes via reactions with a number of reagents.Stereospecific exo-addition to give complexed endo-alcohols were observed in the reaction of III with NaBH4, NaBD4 or CH3Li and in the reaction of VI with CH3Li, the anion of acetonitrile, the anion of nitromethane or the phenylacetylide anion.Ring opening reactions to give complexed o,o'-disubstituted benzophenones were observed when III was treated with the anion of acetonitrile, the anion of nitromethane, methylamine, cyclohexylamine, benzylamine or pyrrolidine.