Copper–Zinc Oxide Catalysts. III. Structure of [Zn(NH₃)₃][Cu(CN)₂]₂

The structure of the new Cu-Zn bimetallic compound, triamminezinc(II) bis[dicyanocuprate(I)] is built up from infinite –Cu-AA-Cu-AA– (where AA represents a disordered CN group) helical chains with 2₁ symmetry. Terminal cyano groups and –CN-Zn(NH₃)₃ groups are bonded alternately to the Cu atoms of the chains. Both crystallographically independent Cu^I atoms are trigonally coordinated by three cyano groups. The Zn^II atom is tetrahedrally coordinated by three ammonia molecules and one nitrogen-bonded cyano group. The intra- and interchain CN...HN hydrogen bonds contribute to the stabilization of the structure.

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