Diferrocenylbispyrylium Salts and Electron-Rich Diferrocenylbispyran from Oxidative Coupling of Ferrocenylpyran. Induced Electron Transfer C-C Bond Making/Breaking Involving a Metallocenyl Radical Intermediate

Abstract : Electrochemical or chemical dimerization of electronrich ferrocenylmethylenepyran 1 gave the first dimetallocenylbispyrylium salt 2 known today, through a reverse process that implies reductive C-C bond breaking. Deprotonation of the bispyrylium salt 2 afforded extended electron-rich diferrocenyl bispyran 3, which was subsequently reversibly oxidized to diferrocenyl bispyrylium salt 4. This study constitutes a new system in which two ox/red sequences of different nature were separated by proton/deprotonation steps.
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Article dans une revue
Organometallics, American Chemical Society, 2008, 27 (24), pp.6396--6399. 〈10.1021/om800638q〉
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Contributeur : Nicolas Le Poul <>
Soumis le : dimanche 12 juillet 2015 - 21:16:40
Dernière modification le : samedi 24 mars 2018 - 01:48:09

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Fatou Ba, Nolwenn Cabon, Francoise Robin-Le Guen, Pascal Le Poul, Nicolas Le Poul, et al.. Diferrocenylbispyrylium Salts and Electron-Rich Diferrocenylbispyran from Oxidative Coupling of Ferrocenylpyran. Induced Electron Transfer C-C Bond Making/Breaking Involving a Metallocenyl Radical Intermediate. Organometallics, American Chemical Society, 2008, 27 (24), pp.6396--6399. 〈10.1021/om800638q〉. 〈hal-01175773〉

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