[1.1]Metallocenophanes of iron and ruthenium: synthesis and characterization of homo-binuclear and hetero-binuclear systems

Abstract

The synthesis of 1.1′-bis(6-fulvenyl)ruthenocene has been realized in two different ways, by either adding dilithio ruthenocene to 6-dimethylaminofulvene or by treating the ligand anion fulvenyl cyclopentadienide with the tetrakis-DMSO complex of ruthenium dichloride. Hydride addition to this bis-fulvene produces the 1,1′-bis(cyclopentadienylmethyl)ruthenocene dianion, which can be converted either (with FeCl2) to the mixed Fe/Ru [1,1]metallocenophane or (with RuCl2(DMSO)4) to [1.1]ruthenocenophane. The mixed Fe/Ru compound can also be obtained from the dianion of 1,1′-bis(cyclopentadienylmethyl)ferrocene and ruthenium dichloride. Both of the new compounds are crystalline materials, which were characterized by 1H and 13C NMR spectra as well as by their electronic absorption and mass spectra. © 1982.