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Ruthenium(II) complexes with ferrocene-modified arene ligands: synthesis and electrochemistry
Auteur(s)
Vieille-Petit, Ludovic
Jeanneret-Gris, Julie
Stepnicka, Petr
Date de parution
2004
In
J. Organomet. Chem.
Vol.
15
No
689
De la page
2456
A la page
2463
Résumé
Arene-Ru complexes [RuCl2{?6-C6H5(CH2)2R}L] with R = OH, CH2OH, OC(O)Fc, CH2OC(O)Fc (Fc = ferrocenyl) and L = PPh3, (diphenylphosphino)ferrocene, or bridging 1,1'-bis(diphenylphosphino)ferrocene, were synthesized. Two synthetic pathways were used for these ferrocene-modified arene-Ru complexes: (a) esterification of ferrocene carboxylic acid with 2-(cyclohexa-1,4-dienyl)ethanol, followed by condensation with RuCl3·nH2O to afford [RuCl2{?6-C6H5(CH2)2OC(O)Fc}]2, and (b) esterification between ferrocene carboxylic acid and [RuCl2{?6-C6H5(CH2)3OH}L] to give [RuCl2{?6-C6H5(CH2)3OC(O)Fc}L]. All new compds. were characterized by NMR and IR spectroscopy as well as by mass spectrometry. The single-crystal x-ray structure anal. of [RuCl2{?6-C6H5(CH2)3OH}(PPh3)] shows that the presence of a CH2CH2CH2OH side-arm allows [RuCl2{?6-C6H5(CH2)3OH}(PPh3)] to form an intramol. H bond with a Cl atom. The electrochem. behavior of selected representative compds. was studied. Complexes with ferrocenylated side arms display the expected cyclic voltammograms, two independent reversible 1-electron waves of the Ru(II)/Ru(III) and Fe(II)/Fe(III) redox couples. Introduction of a ferrocenylphosphine onto the Ru is reflected by an addnl. reversible, 1-electron wave due to ferrocene/ferrocenium system which is, however, coupled with the Ru(II)/Ru(III) redox system. [on SciFinder(R)]
Type de publication
Resource Types::text::journal::journal article
