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Intermediates and Products of the Reaction of Zn(II) Organyls with Tetrel Element Zintl Ions: Cluster Extension versus Complexation The discovery of low-valent Zn compounds resulted in the renaissence of organometal Zn complexes. Polyhedral atom clusters of tetrel elements can interact with Zn atoms either as Lewis donors or by incorporation of the Zn atoms as additional cluster vertices.
The first example of a protonated and a rare example of a metal complex of the tetrahedral tetrel cluster anion [Ge4]4 was obtained from a solution of K6Rb6Ge17 in liquid ammonia in the presence of ZnPh2 and [18]crown-6. In [K([18]crown-6)][Rb([18]crown-6)]2[HGe4ZnPh2] · 8 NH3 (1) one ZnPh2 molecule and one H atom are bound to opposite, significantly elongated edges of a distorted Ge4 tetrahedron.
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