ACTION OF ALKYL-HALIDES ON HOMO-PORPHYRIN AND HETERO-PORPHYRIN DIMERSINVOLVING A RHODIUM-INDIUM BOND, PRODUCING PORPHYRIN COMPLEXES CONTAINING METAL-CARBON AND METAL-HALIDE BONDS

The reactivity of the novel family of metalloporphyrin dimers containi ng a Rh-In bond towards alkyl halides is presented. The chemical react ivity of the homoleptic (same porphyrin ligand) and heteroleptic (diff erent porphyrin ligand) porphyrin complexes with Rh-In metal-metal bon d has been examined by photo- and thermal-processes in the presence of alkyl halides under anaerobic conditions in the dark. The photolytic and thermal reactions have been studied to define the polarity of the Rh-In single bond, as well as to identify the products. The presence o f complexes containing Rh-C bonds in the reaction mixture detected by UV-vis spectroscopy postulated the formulation Rh(I)(-): --> In(III)() for the polarity of the metal-metal bond. In order to characterize t he products we compare our spectroscopic results with those of the lit erature and those of authentic Rh-C containing complexes.