Axial ligand orientations in a distorted porphyrin macrocycle: synthesis, structure, and properties of low-spin bis(imidazole)iron(III) and iron(II) porphyrinates.

Axial ligand orientations in a distorted porphyrin macrocycle: synthesis, structure, and properties of low-spin bis(imidazole)iron(III) and iron(II) porphyrinates.