A Four-Coordinate Fe(III) Porphyrin Cation

摘要

Few families of compounds have been as intensely studied as iron porphyrin complexes. In spite of this, a truly four-coordinate Fe(III) porphyrin cation has never before been reported. The exceptional electrophilicity of the four-coordinate [Fe~(III)(Porph)]~+ cation will even coordinate arene solvent upon crystallization if the counteranion is extremely non-coordinating, as in the work of Reed with silver dihexabromocarborane, and in solution, a Br atom of the hexabromocarborane anion binds to the Fe.