title: Dizinc cation [Zn2](2+) trapped in a homoleptic metalloid coordination environment stabilized by dispersion forces: [Zn2(GaCp*)6][BAr4(F)]2.
abstract: The synthesis and characterization of the cationic mixed metal Ga/Zn cluster [Zn2(GaCp*)6](2+) (1) is presented. The reaction of [Zn2Cp*2] with [Ga2Cp*][BAr4(F)] leads to the formation of the novel complex being the first example of a [Zn2](2+) core exclusively ligated by metalloid group-13 organyl-ligands. Compound 1 exhibits two different coordination modes: In the solid state, two of the six GaCp* ligands occupy bridging positions, whereas VT (1)H NMR indicates the coexistence of a second isomer in solution featuring six terminal GaCp* ligands. Quantum chemical calculations have been carried out to assign the gallium and zinc positions; the bonding situation in 1 is characterized and the importance of dispersion forces is discussed.
authors.affiliation: Inorganic Chemistry II-Organometallics and Materials, Ruhr-University Bochum , D-44780 Bochum, Germany.
authors.forename: Kerstin
authors.initials: K
authors.lastname: Freitag
authors.forename: Hung
authors.initials: H
authors.lastname: Banh
authors.forename: Christian
authors.initials: C
authors.lastname: Gemel
authors.forename: Paul
authors.initials: P
authors.lastname: Jerabek
authors.forename: Rüdiger W
authors.initials: RW
authors.lastname: Seidel
authors.forename: Gernot
authors.initials: G
authors.lastname: Frenking
authors.forename: Roland A
authors.initials: RA
authors.lastname: Fischer