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The result of crystal structure analysis of two Zn–Cu bimetallic complexes are reported. Poly-[diammine-zinc(II)-tricyanocuprate(I)], C 3 H 6 N 5 CuZn, [Zn(NH 3 ) 2 Cu(CN) 3 ] ∞ ,  M r   = 241.03, monoclinic, space group  P 2 1 / n ,  a  = 6.395(2),  b  = 6.827(2),  c  = 17.296(5) Å,  β  = 98.55(2)°,  V  = 746.7(3) Å 3 ,  Z  = 4,  D m   = 2.12,  D x   = 2.14M gm −3 ,  λ (Cu K α  ) = 1.54178 Å,  μ  = 6.72 mm −1 ,  F (000) = 472,  T  = 293 K,  R  = 0.0487 for 856 observed reflections ( F  ≧ 4 σ ( F )). The polymeric structure is formed by [(NH 3 ) 2 Zn(NC)Cu(CN)] 2  rings linked together by bridging cyano groups bonded to the Cu(I) atoms. The Zn(II) atom is tetrahedrally coordinated by two ammonia molecules and two N-oriented cyano groups. The Cu(I) atom is deformed tetrahedrally coordinated by one N-bonded and three C-bonded cyano groups. One of the Cu–C≡N angles exhibits the unusual low value of 156.2(6)°.

zeitschrift für kristallographie - crystalline materials

Crystal and molecular structure of two Zn–Cu compounds: Zn(NH 3 ) 2 Cu(CN) 3  and [Zn(en) 3 ] 6 [Cu 5 (CN) 17 ] · nH 2 O (n = 8.4) containing novel [Cu 2 (CN) 7 ] 5−  ion