Thelma Garcia, C. Beavers, C. Chancellor, M. Olmstead, and A. L. Balch. University of California, Davis, Davis, CA
Oxophlorins are porphyrin derivatives that have been oxygenated at one meso position. There are two tautomeric forms possible: one with a hydroxyl group at one meso positions and two N-H groups, the other with a carbonyl group and 3 N-H groups. Heme catabolism involves the formation of an iron oxophlorin complex in the conversion of heme to biliverdin. Iron oxophlorin complexes are difficult to study because of their inherent air sensitivity, the possibility of multiple oxidation states, and their paramagnetic properties. Hence, the complete description of the heme breakdown remains to be elucidated and models are needed. A new approach to elucidate the breakdown of heme is to use indium oxophorin as a redox inert model. This poster will examine the coordination chemistry of this complex. We show that pyridine cleaves this complex to form In(OEPO)py2. The structural and spectroscopic properties of this complex have been studied using UV-visible spectroscopy and single-crystal x-ray diffraction. Currently effort is being made to obtain the crystal structure of the result monomers formed from the reaction between indium oxophlorin and isocyanides and imidazoles.
Back to Poster Session (Inorganic Chemistry)
Back to The 61st Northwest Regional Meeting (June 25 - 28, 2006)