[N,N′-Bis(3-methoxy-2-oxidobenzylidene)cyclohexane-1,2-diaminium-κ4O,O′,O′′,O′′′]tris(nitrato-κ2O,O′)europium(III) methanol monosolvate

In the title mononuclear salen-type complex, [Eu(NO3)3(C22H26N2O4)]·CH3OH, the EuIII ion is ten-coordinated by three bidentate nitrate counter-ions and one organic salen-type ligand, which acts in a bis-bidentate chelating mode through its phenolate and methoxy O atoms. The protonated imine groups are involved in intramolecular N—H...O hydrogen bonds to the phenolate O atomss, emphasizing the zwitterionic nature of the ligand. An O—H...O hydrogen bond links the complex and solvent molecules.