Thermodynamic properties of the Ni - H bond in complexes of the type [HNi(P 2 RN 2 R′) 2](BF 4) and evaluation of factors that control catalytic activity for hydrogen oxidation/production

Kendra Fraze, Aaron D. Wilson, Aaron M. Appel, M. Rakowski DuBois, Daniel L. Dubois

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Abstract

Thermodynamic data for hydride complexes of the general formula [HNi(P 2 RN 2 R′) 2](BF 4), 3, which have been reported previously to function as effective catalysts for the electrochemical oxidation or production of hydrogen, have been determined. Values of ΔG o H+, ΔG o H-, and ΔG o H- have been determined for 3a where R = Cy, R′ = Bz, for 3b where R = R′ = Ph, and for the new complex 3c, R = Ph, R′ = B z. In addition, the ΔG values for the heterolytic addition of hydrogen to the Ni(II) precursor complexes [Ni(P 2 RN 2 R′) 2](BF 4) 2, 1a - c, have been determined experimentally or calculated. The data are useful for understanding the factors that control the catalytic activities observed for these complexes and for the design of additional catalysts.

Original languageEnglish
Pages (from-to)3918-3924
Number of pages7
JournalOrganometallics
Volume26
Issue number16
DOIs
Publication statusPublished - Jul 30 2007

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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