Synthesis and structure of isocorrole metal complexes

Abstract

gem-dimethylisocorrole gave four-coordinate Ni (II) and Cu (II) complexes, five-coordinate (chloro) Fe (III) and (chloro) Mn (III) complexes, and six-coordinate (chloro)(pyridinato) Rh (III) complex in moderate to good yields. The dinuclear complexes such as the μ-oxo-diiron(III) complex and tetracarbonyldirhodium(I) complex were also prepared. The structures of these mononuclear and dinuclear complexes were determined by X-ray crystallography. These structures are very similar to those of the corresponding metaloporphyrins but the presence of the sp3-meso carbon allows tilting of the pyrrole rings so as to adapt itself to various metal coordination geometries.