2,2′:6′,2′′-Terpyridines bearing a substituent × in the 4′-position [3a: × = Fc–C≡C–p-C6H4; 3b: × = Fc#–C≡C–p-C6H4; Fc = (C5H5)Fe(C5H4), Fc# = (C5Me4H)Fe(C5Me4)] were prepared by Pd0-catalysed cross-coupling reactions. 3b was characterised by X-ray structure analysis. [(3a)RuCl2(DMSO)] (4a) and [(3b)RuCl2(DMSO)] (4b) were obtained by reaction of [RuCl2(DMSO)4] with 1 equivalent of 3a and 3b, respectively, while the analogous reaction with 2 equivalents afforded [(3a)2Ru][PF6]2 (5a) and [(3b)2Ru][PF6]2 (5b), respectively, after precipitation with aqueous [NH4][PF6]. Similarly, [(3a)Ru(tpy)][PF6]2 (6) was isolated from the reaction of 4a with 2,2′:6′,2′′-terpyridine (tpy). Compounds 3 and 5 were investigated by cyclic voltammetry, which revealed that the introduction of eight methyl groups leads to the expected cathodic shift of the E0′ values of ca. 0.44 V for the ferrocenyl-centered redox processes.

Siemeling, U., Vorfeld, U., Neumann, B., Stammler, H.G., Zanello, P., Fabrizi De Biani, F. (1999). Terpyridines functionalised with ferrocenyl groups of different redox potential. EUROPEAN JOURNAL OF INORGANIC CHEMISTRY(1), 1-5 [10.1002/(SICI)1099-0682(199901)1999:1<1::AID-EJIC1>3.0.CO;2-W].

Terpyridines functionalised with ferrocenyl groups of different redox potential

Zanello, Piero;Fabrizi De Biani, Fabrizia
1999-01-01

Abstract

2,2′:6′,2′′-Terpyridines bearing a substituent × in the 4′-position [3a: × = Fc–C≡C–p-C6H4; 3b: × = Fc#–C≡C–p-C6H4; Fc = (C5H5)Fe(C5H4), Fc# = (C5Me4H)Fe(C5Me4)] were prepared by Pd0-catalysed cross-coupling reactions. 3b was characterised by X-ray structure analysis. [(3a)RuCl2(DMSO)] (4a) and [(3b)RuCl2(DMSO)] (4b) were obtained by reaction of [RuCl2(DMSO)4] with 1 equivalent of 3a and 3b, respectively, while the analogous reaction with 2 equivalents afforded [(3a)2Ru][PF6]2 (5a) and [(3b)2Ru][PF6]2 (5b), respectively, after precipitation with aqueous [NH4][PF6]. Similarly, [(3a)Ru(tpy)][PF6]2 (6) was isolated from the reaction of 4a with 2,2′:6′,2′′-terpyridine (tpy). Compounds 3 and 5 were investigated by cyclic voltammetry, which revealed that the introduction of eight methyl groups leads to the expected cathodic shift of the E0′ values of ca. 0.44 V for the ferrocenyl-centered redox processes.
1999
Siemeling, U., Vorfeld, U., Neumann, B., Stammler, H.G., Zanello, P., Fabrizi De Biani, F. (1999). Terpyridines functionalised with ferrocenyl groups of different redox potential. EUROPEAN JOURNAL OF INORGANIC CHEMISTRY(1), 1-5 [10.1002/(SICI)1099-0682(199901)1999:1<1::AID-EJIC1>3.0.CO;2-W].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/20080
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo