Abstract
Ferrocene was the starting point for organometallic chemistry nearly four decades ago and is still today one of the most studied and versatile organometallic building blocks.1 Ferrocene has been incorporated in polymeric systems to alter bulk properties of the material.2 Ferrocene possesses excellent thermal and photochemical stability and can also protect polymeric systems from photodegradation.3 In addition, the ferrocene building block has been used in conducting polymers4 and in main chain liquid crystalline polyesters.5
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References
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This work was completed at the Polymer Science Division of the Naval Weapons Center, China Lake, California. Division Head: Dr. Geoff Lindsay.
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The α-ferrocenylisopropyl carbocation was isolated in ref. 12(b) and a α-(octamethylferrocenyl) methyl carbocation has also been isolated C. Zou and M. S. Wrighton, J.Am. Chem. Soc. 112: 7578 (1990). Furthermore, α-(nonamethyl-ruthenocenyl) methyl carbocation has been generated and utilized to prepare derivatives via nucleophilic reactions (U. Kölle and J. Grub, J. Organomet. Chem. 289: 133 (1985). From these examples it is apparent that substitution at the j-methyl carbon or on the η5-cyclopentadienyl rings are both very important in stabilizing the carbocation. To our knowledge no ferrocenyl carbocation derivatives bearing electron-withdrawing groups have been postulated or observed.
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Wright, M.E., Toplikar, E.G. (1992). New Ferrocene Complexes and Polymers for Nonlinear Optical Applications. In: Salamone, J.C., Riffle, J.S. (eds) Advances in New Materials. Contemporary Topics in Polymer Science, vol 7. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3456-3_24
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DOI: https://doi.org/10.1007/978-1-4615-3456-3_24
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