Dimethyl­ammonium tetra­chloridoferrate(III) 18-crown-6 clathrate

The reaction of dimethyl­amine hydro­chloride, 18-crown-6 and ferric chloride in ethanol yields the title compound, (C(2)H(8)N)[FeCl(4)]·C(12)H(24)O(6), which exhibits an unusual supramolecular structure. The protonated dimethyl­amine contains one NH(2) (+) group, resulting in a 1:1 supra­molecular rotator–stator structure (CH(3)—NH(2) (+)—CH(3))(18-crown-6), through N—H⋯O hydrogen-bonding inter­actions between the ammonium group of the cation and the O atoms of the crown ether. In the crystal, all three components lie on a common crystallographic mirror plane normal to [010].