Rhodium(), rhodium() and iridium() carbaporphyrins

Treatment of a benzocarbaporphyrin with [Rh(CO) 2 Cl] 2 in refluxing dichloromethane gave a rhodium( i ) dicarbonyl complex, and further reaction in refluxing pyridine afforded an organometallic rhodium( iii ) derivative. The carbaporphyrin also reacted with [Ir(COD)Cl] 2 and pyridine in refluxing p -xylene to generate a related iridium( iii ) compound. These novel metalated porphyrinoids retained strongly diatropic characteristics and were fully characterized by XRD. Reaction of a benzocarbaporphyrin with [Rh(CO) 2 Cl] 2 or [Ir(COD)Cl] 2 gave a rhodium( i ) dicarbonyl complex and rhodium( iii ) or iridium( iii ) organometallic derivatives.