title: 4,5-diazafluorene-based overcrowded alkene: a new ligand for transition metal complexes.
abstract: [structure: see text] A new ligand system, where a 4,5-diazafluorene-type chelate and a methoxybenzoxanthene unit are coupled by a double bond has been synthesized and fully characterized including X-ray structure. The synthesis and UV-vis spectra of Ru(II), Os(II), and Re(I) complexes with the above-mentioned ligand are also shown.
authors.affiliation: Department of Chemistry, University of Fribourg, Pérolles, CH-1700 Fribourg, Switzerland.
authors.forename: Manel
authors.initials: M
authors.lastname: Querol
authors.forename: Helen
authors.initials: H
authors.lastname: Stoekli-Evans
authors.forename: Peter
authors.initials: P
authors.lastname: Belser