Entropy and enthalpy contributions to the kinetics of proton coupled electron transfer to the Mn4O4(O2PPh 2)6 cubane

Thomas G. Carrell, Paul F. Smith, Joseph Dennes, G. Charles Dismukes

Research output: Contribution to journalArticle


The dependence of rate, entropy of activation, and (1H/ 2H) kinetic isotope effect for H-atom transfer from a series of p-substituted phenols to cubane Mn4O4L6 (L = O2PPh2) (1) reveals the activation energy to form the transition state is proportional to the phenolic O-H bond dissociation energy. New implications for water oxidation and charge recombination in photosystem II are described.

Original languageEnglish
Pages (from-to)11843-11847
Number of pages5
JournalPhysical Chemistry Chemical Physics
Issue number24
Publication statusPublished - Jun 28 2014


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this