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Issue 24, 2014
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Entropy and enthalpy contributions to the kinetics of proton coupled electron transfer to the Mn4O4(O2PPh2)6 cubane

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Abstract

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.

Graphical abstract: Entropy and enthalpy contributions to the kinetics of proton coupled electron transfer to the Mn4O4(O2PPh2)6 cubane

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The article was received on 09 Dec 2013, accepted on 04 Mar 2014 and first published on 05 Mar 2014


Article type: Communication
DOI: 10.1039/C3CP55200D
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Phys. Chem. Chem. Phys., 2014,16, 11843-11847

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    Entropy and enthalpy contributions to the kinetics of proton coupled electron transfer to the Mn4O4(O2PPh2)6 cubane

    T. G. Carrell, P. F. Smith, J. Dennes and G. C. Dismukes, Phys. Chem. Chem. Phys., 2014, 16, 11843
    DOI: 10.1039/C3CP55200D

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