Poly[penta­kis­(μ-cyanido-κ(2) N:C)tris­(5-phenyl-2,2′-bipyridine-κ(2) N,N′)penta­copper(I)]

The hydro­thermal reaction of Cu(acetate)(2) and K(3)[Fe(CN)(6)] with 5-phenyl-2,2′-bipyridine (5-ph-2,2′-bpy) in water yields the polymeric title complex, [Cu(5)(CN)(5)(C(16)H(12)N(2))(3)](n), which consists of ribbons along the a axis, constructed from 26-membered {Cu(10)(CN)(8)} rings. In these rings, the metal atoms are bridged by cyanide groups, except for one close Cu⋯Cu contact [2.7535 (12) Å], which can be considered as ligand-unsupported. Within the rings, one Cu atom has a distorted tetra­hedral geometry through the coordination to two N atoms from 5-ph-2,2′-bpy and two N/C atoms from two cyanide groups. Two Cu atoms have a trigonal planar environment being coordinated by three cyanide groups and two other Cu atoms have a distorted square planar geometry through coordination to two N atoms from 5-ph-2,2′-bpy and two N/C atoms from two cyanide groups.