Bis(1H-imidazole-κN3){2,2′-[propane-1,2-diylbis(nitrilomethylidyne)]diphenolato-κ4O,N,N′,O′}iron(III) perchlorate

Abstract

The title compound, [Fe(C17H16N2O2)(C3H4N2)2]ClO4, consists of monomeric [Fe(salmen)(HIm)2]+ cations {salmen is the 2,2′-[propane-1,2-diylbis(nitrilomethylidyne)]diphenolate dianion and HIm is 1H-imiazole} and perchlorate anions. In the cation, the Fe3+ ion is octahedrally coordinated by two N atoms and two O atoms from a tetradentate salmen anion and two N atoms from two Him molecules. These ligands are coordinated to the iron ion in a direction perpendicular to the [Fe(salmen)]+ coordination plane. The benzene ring planes in the salmen ligands are oriented nearly parallel to one another intermolecularly [dihedral angle = 6.36 (3)°]. The dihedral angle between the mean planes through the imidazole rings in the cation is 76.9 (2)°. In the crystal, N—H...O interactions link the molecules into a one-dimensional double chain running along [101] and C—H...O interactions link the double chains into a two-dimensional network, running parallel to the ac plane.