Di-μ-cyanido-1:2κ(2) C:N,2:3κ(2) N:C-hexa­cyanido-1κ(3) C,3κ(3) C-tetra­kis(1,10-phenanthroline)-1κ(2) N,N′;2κ(4) N,N′;3κ(2) N,N′-1,3-dicobalt(III)-2-iron(II) tetra­hydrate

The hydro­thermal reaction of CoCl(2)·6H(2)O, 1,10-phenanthroline (phen) and K(3)[Fe(CN)(6)] in deionized water yielded the title cyanide-bridged trinuclear cluster, [Co(2)Fe(CN)(8)(C(12)H(8)N(2))(4)]·4H(2)O or [{Co(III)(phen)(CN)(4)}(2){Fe(II)(phen)(2)}]·4H(2)O, which contains two Co(III) centers and one Fe(II) center linked by cyanide bridges. The combination of coordinative bonds, O—H⋯N and O—H⋯O hydrogen bonds and π–π stacking inter­actions [centroid–centroid distance = 3.630 (2) Å] results in the stabilization of a supra­molecular structure. All uncoordinated water molecules are disordered. Thermogravimetric analysis reveals that the title complex loses the four crystal water mol­ecules at about 333 K, then the anhydrous phase loses no further mass up to about 573 K, above which decomposition occurs.