It is the product of the formal dehydrocoupling of ferrocene, analogous the relationship between biphenyl and benzene.

It is an orange, air-stable solid that is soluble in nonpolar organic solvents.

[1] Its one-electron oxidized derivative [(C5H5)Fe(C5H4)]2+ attracted attention as a prototypical mixed-valence compound.

[2] A related compound is biferrocenylene, [Fe(C5H4)2]2 wherein all cyclopentadienyl rings are coupled.

Biferrocene can easily be converted into a mixed-valence complex, which is called biferrocenium.