Kinetics and Mechanisms of Degradation of Binuclear Cobalt Dioxygen Complexes

  • Arup K. Basak
  • Arthur E. Martell


The stability constants and oxygenation constants of the cobalt(II) dioxygen complex, 1, of the polyamine 1,6-bis(2-pyridyl)-2,5-diazahexane, PYEN, have been determined by potentiometrie methods. The degradation of the binuclear dibridged (µ-peroxo-µ-hydroxo)dioxygen complex formed by Co(II)-PYEN is compared with those of the monobridged cobalt(Il)-dioxygen complexes, 2 and 3, formed by the cobalt(II) complexes of the pentadentate polyamines 1,9-bis(2-pyridyl)2,5,8.-triazanonane (PYDIEN)l and 2,6-bis(2-(3,6-diazahexyl)pyridine) (EPYDEN)2 respectively. The equilibrium constants obtained determine the concentrations of the complexes formed by PYEN in aqueous solution and distribution curves are presented, which show the pH range in which the dioxygen complex 1 is the predominant species.


Stability Constant Potentiometric Method Predominant Species Oxidative Dehydrogenation Dehydrogenation Reaction 
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Copyright information

© Plenum Press, New York 1988

Authors and Affiliations

  • Arup K. Basak
    • 1
  • Arthur E. Martell
    • 1
  1. 1.Department of ChemistryTexas A&M UniversityCollege StationUSA

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