Bis­[bis­(diethyl­enetri­amine)­zinc(II)] hexa­cyano­ferrate tetrahydrate

In the crystal structure of the title compound, Zn(C₄H₁₃N₃)₂]₂Fe(CN)₆]·4H₂O, the asymmetric unit is formed by a Zn(dien)₂]²⁺ cation (dien = diethyl­enetri­amine, NH₂CH₂CH₂NHCH₂CH₂NH₂), water mol­ecules and half of the Fe(CN)₆]^4? anion which is related by inversion symmetry through the Fe atom. The geometry around the Zn and Fe atoms is distorted octahedral and octahedral, respectively. Intramolecular O—H?O hydrogen bonds involving the water mol­ecules, and intermolecular O—H?N hydrogen bonds involving the water mol­ecules and the anions, result in an infinite chain. Intramolecular O—H?O and N—H?N, and intermolecular O—H?N, N—H?O and N—H?N hydrogen bonds form a three‐dimensional framework.