2,9‐Dimethyl‐1,10‐phenanthrolinium bis(pyridine‐2,6‐dicarboxylato‐κ3O,N,O′)ferrate(III) dihydrate

The title compound, (C14H13N2)[Fe(C7H3NO4)2]·2H2O or (dmpH)[Fe(pydc)2]·2H2O (dmp is 2,9‐dimethyl‐1,10‐phenanthroline and pydcH2 is pyridine‐2,6‐dicarboxylic acid), is a six‐coordinate FeIII complex obtained by reacting neocuproine (dmp), dipicolinic acid (pydcH2) and iron(II) chloride. The anionic six‐coordinate complex has a distorted octahedral geometry and is connected to its counter‐cation by a number of intermolecular interactions, forming infinite one‐dimensional chains in the [010] direction. Ion pairing, metal–ligand coordination and van der Waals forces, as well as intermolecular X—H...O hydrogen bonds (X = O, N and C) and π–π stacking interactions [with centroid‐to‐centroid separations of 3.531 and 3.457 Å, shortest interplanar distances of 3.355 and 3.449 Å, and interplanar angles of 1.89 and 5.45°], result in a three‐dimensional framework.