Di-μ-aqua-bis­({N-[(2-dimethyl­amino-κN)eth­yl]-N,N′,N′-trimethyl­ethane-1,2-diamine-κ²N,N′}sodium(I)) diiodide

The title compound comprises centrosymmetric dimeric units, [Na₂(PMDTA)₂(H₂O)₂]²⁺ (PMDTA is N,N,N′,N′′,N′′-penta­methyl­di­ethylene­tri­amine, C₉H₂₃N₃), where two Na cations are bridged by two water mol­ecules. Each Na⁺ cation is also coordinated by three N atoms of a PMDTA mol­ecule to give a five-coordinate distorted square-pyramidal geometry. Polymeric chains are then obtained through weak inter­actions between the water mol­ecules and the I⁻ anions that provide the charge balance. The cations and anions lie on a mirror plane.