Synthesis and characterization of homo- and heteroporphyrin dimers involving a rhodium-indium bond

Article abstract of DOI:10.1016/0277-5387(95)00256-R

The synthesis of a novel family of metalloporphyrin dimers containing a metal metal (transition non-transition metal) bond is presented. The reduction by NaBH₄ of the transition metal porphyrin complexes (Por)Rh¹¹¹(Cl) generates the low oxidation state complexes (Por)Rh¹ Na , which by reaction with chloro-indium-porphyrin derivatives, (Por)In¹¹¹(Cl), give rise to the above new family. By choosing the appropriate porphyrin ligand it is possible to vary the bond stability in these dimers systematically. The synthesis of porphyrin dimers involving rhodium-indium bonds, and their full characterization on the basis of ¹H NMR. UV visible and FT-IR spectroscopy are described. A preliminary study of the photosensitivity of these complexes provides sufficient information about the stability of the metal metal bond.