Institution: | aLaboratoire de Chimie des Métaux de Transition et de Catalyse (UMR CNRS 7513), Institut Le Bel, Université Louis Pasteur, 4, rue Blaise Pascal, 67070 Strasbourg Cedex, France bInstitut Charles Sadron (UPR CNRS 22), 6, rue Boussingault, BP 40016, 67083 Strasbourg Cedex, France cLaboratoire de Cristallochimie et de Chimie Structurale (UMR CNRS 7513), Institut Le Bel, Université Louis Pasteur, 4, rue Blaise Pascal, 67070 Strasbourg Cedex, France |
Abstract: | Dicationic iron complexes were obtained upon complexation of the ligands 6,6″-di(p-tolyl)-2,2′:6′,2″-terpyridine (L1) or 2,6-bis-(3-mesitylpyrazol-1-yl)pyridine (L2) with iron dichloride or iron trichloride. They were characterized by X-ray diffraction and FT-IR spectroscopy. Single crystal structure determinations of , and all show six-coordinate metal center. These complexes were obtained from L1FeCl2 and L2FeCl2 during recrystallization attempts. (L1)2Fe2+ was shown to be a high-spin complex, whereas (L2)2Fe2+ was shown to be low-spin. For , two independent dications of very similar geometry but with distinctive distortion were observed by X-ray analysis. |