Bis(fulvalene)diiron

Bis(fulvalene)diiron is the organoiron complex with the formula (C5H4-C5H4)2Fe2.

Structurally, the molecule consists of two ferrous centers sandwiched between fulvalene dianions.

The compound is an orange solid with lower solubility in benzene than ferrocene.

[1] The compound has attracted some interest for its redox properties.

[2] It was first prepared by Ullmann coupling of 1,1'-diiodoferrocene using copper but subsequent work produces the complex is 20-40% yield from dilithiofulvalene and ferrous chloride:[3] MgCpBr (TiCp2Cl)2 TiCpCl3 TiCp2S5 TiCp2(CO)2 TiCp2Me2 VCpCh VCp2Cl2 VCp(CO)4 (CrCp(CO)3)2 Fe(η5-C5H4Li)2 ((C5H5)Fe(C5H4))2 (C5H4-C5H4)2Fe2 FeCp2PF6 FeCp(CO)2I CoCp(CO)2 NiCpNO ZrCp2ClH MoCp2Cl2 (MoCp(CO)3)2 RuCp(PPh3)2Cl RuCp(MeCN)3PF6