New Polypyridine Ligands Functionalized with Redox-Active Fe(II) Organometallic Fragments

• Published in: Inorganic chemistry Vol. 46; no. 22; pp. 9036 - 9038
• Main Authors: Paul, Frédéric, Goeb, Sébastien, Justaud, Frédéric, Argouarch, Gilles, Toupet, Loic, Ziessel, Raymond F, Lapinte, Claude
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 29.10.2007
• Subjects: Chemical Sciences; Coordination chemistry
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/ic7014379

We report in this Communication the isolation and characterization, including structure determinations, of 2,2‘,6‘,2‘ ‘-terpyridine (2) and 2,2‘-bipyridine (3) ligands bearing two redox-active “(η2-dppe)(η5-C5Me5)FeC⋮C−” moieties grafted to the 5 and 5‘ ‘ positions of terpy or to the 5 and 5‘ positions of bipy. These “metalloligands” have been complexed with Ru(II) and Mo(0), providing new heterotrinuclear complexes displaying intense absorptions around 700 and 600 nm, respectively, for the Fe2Ru/terpy and Fe2Mo/bipy species. In both cases, the Fe(II)/Fe(III) oxidation potentials of the free ligands became more positive by more than 50 mV upon complexation.