Biferrocene
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| Identifiers | |
|---|---|
| Properties | |
| C20H18Fe2 | |
| Molar mass | 370.054 g·mol−1 |
| Appearance | dark orange solid |
| Melting point | 239–240 °C (462–464 °F; 512–513 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Biferrocene is the organometallic compound with the formula [(C5H5)Fe(C5H4)]2. 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.
Biferrocene can be prepared by the Ullmann coupling of iodoferrocene.[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. Formally, biferrocene is derived from one fulvalene ligand, and biferrocenylene is derived from two.
References
- ^ M. D. Rausch (1961). "Ferrocene and Related Organometallic π-Complexes. IV. Some Ullmann Reactions of Haloferrocenes". J. Org. Chem. 26: 1802–1805. doi:10.1021/jo01065a026.
- ^ "Organic Solid State. VIII. Mixed-Valence Ferrocene Chemistry". Accounts Chem. Res. 6: 1–7. 1973. doi:10.1021/ar50061a001.
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