Diversity of Functionalized Germanium Zintl Clusters: Syntheses and Theoretical Studies of [Ge9PdPPh3]3− and [Ni@(Ge9PdPPh3)]2−
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- Sun, ZM., Zhao, YF., Li, J. et al. J Clust Sci (2009) 20: 601. doi:10.1007/s10876-009-0266-1
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A new Zintl cluster [Ge9PdPPh3]3− has been isolated as (2,2,2-crypt)K+ salt through the reaction of K4Ge9 and Pd[PPh3]4 in ethylenediamine solutions and characterized via single-crystal X-ray crystallography. The as-prepared bimetallic [Ge9PdPPh3]3− cluster could successfully trap a nickel atom to form a trimetallic cluster [Ni@(Ge9PdPPh3)]2−. The coordination of Ge94− by PdPPh3 induces a one-electron oxidation and encapsulation of the Ni atom into the Ge93− cage leads to a further one-electron oxidation and a geometry transformation from C4v (nido) to C3v (closo).