Bis[tris-(ethane-1,2-diamine)nickel(II)] octa-cyanidomolybdate(IV) dihydrate.

The title complex, [Ni(II)(C(2)H(8)N(2))(3)](2)[Mo(IV)(CN)(8)]·2H(2)O, crystallized from a mixture of ethane-1,2-diamine (en), octa-cyano-molybdate(IV), [Mo(CN)(8)](4-), and the transition metal ion Ni(2+). In the crystal structure, the Mo polyhedron has a square-anti-prismatic shape, while the geometry around the Ni atom is distorted octa-hedral. The complex ions and water mol-ecules are linked by hydrogen bonds.