Tris(ethane-1,2-diamine-κ(2) N,N′)cobalt(III) carbonate iodide tetra­hydrate

The title compound, [Co(C(2)H(8)N(2))(3)](CO(3))I·4H(2)O, crystallizes with a [Co(en)(3)](3+) cation (en is ethane-1,2-diamine), CO(3) (2−) and I(−) anions and four water mol­ecules in the asymmetric unit. In the cation, the three rings formed by the ethyl­enediamine units and the Co(III) metal ion are in slightly distorted twist conformations. Numerous O—H⋯O, N—H⋯O, N—H⋯I and O—H⋯I inter­molecular hydrogen bonds between the cation and two anions in concert with the four water mol­ecules dominate the crystal packing and create a supra­molecular infinite three-dimensional framework.