title: Structure and reactivity of distanna[2]metallocenophanes of ruthenium and osmium.
abstract: We report the molecular structures of 1,1'-dilithiometallocenes of ruthenium and osmium. These compounds served as precursors for the synthesis and subsequent structural characterization of the first [2]osmocenophanes with disilane and distannane bridges, as well as of a distanna[2]ruthenocenophane. In addition, the insertion of sulfur and selenium into the Sn-Sn bridges was studied and it was observed that the presence of the Lewis base pmdta (N,N,N',N″,N″-pentamethyldiethylenetriamine) dramatically accelerates the reaction.
authors.affiliation: Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97070 Würzburg, Germany. h.braunschweig@uni-wuerzburg.de
authors.forename: Holger
authors.initials: H
authors.lastname: Braunschweig
authors.forename: Florian
authors.initials: F
authors.lastname: Hupp
authors.forename: Thomas
authors.initials: T
authors.lastname: Kramer
authors.forename: Julian
authors.initials: J
authors.lastname: Mager