Oxygen Binding to Cobalt Porphyrins

James P. Collman, John I. Brauman, Kenneth M. Doxsee, Thomas R. Halbert, Susan E. Hayes, Kenneth S. Suslick

Research output: Contribution to journalArticlepeer-review


The thermodynamic constants of oxygen binding to cobalt “picket fence” porphyrin complexes, meso-tetra(α,α,α,α-o-pivalamidophenyl)porphyrinatocobalt(II)-1-methylimidazole and 1,2-dimethylimidazole, are reported. In contrast to previously studied cobalt porphyrins, these complexes bind oxygen with the same affinity as cobalt substituted myoglobin and hemoglobin. Solvation effects are discussed as the source of this difference. The use of sterically hindered axial bases as models of T state hemoglobin is discussed.

Original languageEnglish (US)
Pages (from-to)2761-2766
Number of pages6
JournalJournal of the American Chemical Society
Issue number9
StatePublished - 1978
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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