Dizinc cation [Zn2](2+) trapped in a homoleptic metalloid coordination environment stabilized by dispersion forces:
Kerstin Freitag1, Hung Banh, Christian Gemel
1Inorganic Chemistry II-Organometallics and Materials, Ruhr-University Bochum , D-44780 Bochum, Germany.
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.
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