title: Formation of superoxide anion on aerial oxidation of Cu(II)-porphyrinogen in the synthesis of tetrakis(cyclohexyl)porphyrinogenCu(III) anion.
abstract: Tetraethylammonium-tetrakis(cyclohexyl)porphyrinogenCu(II) (1) is spontaneously oxidized by aerial oxygen to the corresponding Cu(III) (2) species, producing 1 equiv of O2(-). Steric crowding of the peripheral hydrogens in 1 prevented any direct Cu-O2 bond formation in the oxidation process, which suggests an outer-sphere electron transfer reaction.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, India.
authors.forename: Dibyendu
authors.initials: D
authors.lastname: Bhattacharya
authors.forename: Suman
authors.initials: S
authors.lastname: Maji
authors.forename: Kuntal
authors.initials: K
authors.lastname: Pal
authors.forename: Sabyasachi
authors.initials: S
authors.lastname: Sarkar
mesh_terms: D003300:Copper / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D011165:Porphyrinogens / Q000737:chemistry*; D013481:Superoxides / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D011165:Porphyrinogens; D013481:Superoxides; D003300:Copper; D010100:Oxygen