Poly[[di­aqua­deca-μ(2)-cyanido-κ(20) C:N-hexa­cyanido-κ(6) C-bis­(μ(2)-5-methyl­pyrimidine-κ(2) N:N′)bis­(5-methyl­pyrimidine-κN)tricopper(II)ditungstate(V)] dihydrate]

In the title complex, {[Cu(3)[W(CN)(8)](2)(C(5)H(6)N(2))(4)(H(2)O)(2)]·2H(2)O}(n), the coordination polyhedron of the eight-coordinated W(V) atom is a bicapped trigonal prism, in which five CN groups are bridged to Cu(II) ions, and the other three CN groups are terminally bound. Two of the Cu(II) ions lie on a centre of inversion and each of the three independent Cu(II) cations is pseudo-octahedrally coordinated. In the crystal structure, cyanido-bridged-Cu—W—Cu layers are linked by pillars involving the third independent Cu(II) ion, generating a three-dimensional network with non-coordinating water mol­ecules and 5-methyl­pyrimidine mol­ecules. O—H⋯O and O—H⋯N hydrogen bonds involve the coordinating and non-coordin­ating water mol­ecules, the CN groups and the 5-methyl­pyrimidine mol­ecules.