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

Fatou Ba; Nolwenn Cabon; Francoise Robin-Le Guen; Pascal Le Poul; Nicolas Le Poul; Yves Le Mest; Stéphane Golhen; Bertrand Caro

doi:10.1021/om800638q

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

Fatou Ba ^{1, 2} Nolwenn Cabon ³ Francoise Robin-Le Guen ¹ Pascal Le Poul ¹ Nicolas Le Poul ⁴ Yves Le Mest ⁴ Stéphane Golhen ¹ Bertrand Caro ¹

1 ISCR - Institut des Sciences Chimiques de Rennes

2 IUT Lannion - institut universitaire technologie - Lannion

3 Organométalliques: Matériaux et Catalyse

ISCR - Institut des Sciences Chimiques de Rennes, IUT Lannion - institut universitaire technologie - Lannion

4 CEMCA - Chimie, Electrochimie Moléculaires et Chimie Analytique

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.

Type de document :

Article dans une revue

Organometallics, American Chemical Society, 2008, 27 (24), pp.6396--6399. 〈10.1021/om800638q〉

Domaine :

Chimie / Chimie de coordination

Chimie / Chimie analytique

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http://hal.univ-brest.fr/hal-01175773
Contributeur : Nicolas Le Poul <>
Soumis le : dimanche 12 juillet 2015 - 21:16:40
Dernière modification le : vendredi 27 juillet 2018 - 11:54:01

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

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

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