Possible Origin for Porphin Derivatives in Prebiotic Chemistry a Computational Study

Details Possible Origin for Porphin Derivatives in Prebiotic Chemistry a Computational Study Possible Origin for Porphin Derivatives in Prebiotic Chemistry a Computational Study

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005oleb...35..345a&link_type=abstract

Origins of Life and Evolution of Biospheres, Volume 35, Issue 4, pp.345-368

Physics

1

Origins Of Porphyrins, Prebiotic Availability Of Photosynthetic Pigments, Prebiotic Chemistry, Theoretical Chemistry

Scientific paper

A set of chemical reactions is postulated to account for the formation of the macrocyclic porphin structure, basic to the pyrrole derivatives chlorophyll, protoporphyrin, heme and bilirubin, important in photosynthesis, respiration and digestion. A set of equations is given for the prebiotic synthesis of porphin derivatives from the simple molecules; cyanoacetylene, diacetylene, carbon monoxide and ammonia that have been detected in space. A number of isomers of hydrogenated porphin arise which may lose hydrogen to give ultimately porphin and its dehydrogenated derivative. The reactions, while not unique, provide a pathway which has been shown to be feasible from the overall enthalpy changes in the ZKE approximation at the HF and MP2/6-31G* level

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