title: Coordination Chemistry of Disilylated Germylenes with Group 4 Metallocenes.
abstract: Reaction of the PEt3adduct of a disilylated five-membered cyclic germylene with group 4 metallocene dichlorides in the presence of magnesium led to the formation of the respective germylene metallocene phosphine complexes of titanium, zirconium, and hafnium. Attempts to react the related NHC adduct of a disilylated four-membered cyclic germylene under the same conditions with Cp2TiCl2did not give the expected germylene NHC titanocene complex. This complex was, however, obtained in the reaction of Cp2Ti(btmsa) with the NHC germylene adduct. A computational analysis of the structure of the group 4 metallocene germylene complexes revealed the multiple-bond character of the M-Ge(II) linkage, which can be rationalized with the classical σ-donor/π-acceptor interaction. The strength of the M-Ge(II) bond increases descending group 4.
authors.affiliation: Institut für Anorganische Chemie, Technische Universität Graz , Stremayrgasse 9, 8010 Graz, Austria.
authors.forename: Johann
authors.initials: J
authors.lastname: Hlina
authors.forename: Judith
authors.initials: J
authors.lastname: Baumgartner
authors.forename: Christoph
authors.initials: C
authors.lastname: Marschner
authors.forename: Patrick
authors.initials: P
authors.lastname: Zark
authors.forename: Thomas
authors.initials: T
authors.lastname: Müller