title: Oxygen atom transfer from nitrite mediated by Fe(III) porphyrins in aqueous solution.
abstract: Aqueous solutions of the iron(III) porphyrin complex FeIII(TPPS) (1, TPPS = tetra(4-sulfonatophenyl)-porphyrinato) and nitrite ion react with various substrates S to generate the ferrous nitrosyl complex FeII(TPPS)(NO) (2) plus oxidized substrate. When S is a water-soluble sulfonated phosphine, the product is the resulting monoxide. When air is introduced to the product solutions, 2 is rapidly reoxidized to 1; however, even in the absence of air, there is a slow regeneration of the ferric species with concomitant production of nitrous oxide. Thus, in an anaerobic aqueous environment, FeIII(TPPS) catalyzes oxygen atom transfer from nitrite ion to substrates with the eventual formation of N2O.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, USA.
authors.forename: Chosu
authors.initials: C
authors.lastname: Khin
authors.forename: Julie
authors.initials: J
authors.lastname: Heinecke
authors.forename: Peter C
authors.initials: PC
authors.lastname: Ford
mesh_terms: D005290:Ferric Compounds / Q000737:chemistry*; D008024:Ligands; D008665:Metalloporphyrins / Q000737:chemistry*; D009573:Nitrites / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D012996:Solutions / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D005290:Ferric Compounds; D008024:Ligands; D008665:Metalloporphyrins; D009573:Nitrites; D012996:Solutions; D014867:Water; D010100:Oxygen