Isotopic exchange between H2 and D2 by the Rideal-Eley mechanism

Ralph D. Gillespie, Robert L. Burwell, Tobin J Marks

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5 Citations (Scopus)


The rate of the reaction, H2+D2 → 2HD, is very rapid at -160 °C on the catalyst Cp′2Th-(CH3)2/dehydroxylated Al2O3, activated in H2+D2 and believed to contain supported Cp′2ThH+(Cp′ = η5-pentamethylcyclopentadienyl). Even at -195 °C, the turnover frequency is greater than 0.1 sec-1 at {Mathematical expression} atm. Strong evidence is adduced that the exchange proceeds by a Rideal-Eley process, i.e. by a four-center transition state involving Th-H+D-D.

Original languageEnglish
Pages (from-to)363-368
Number of pages6
JournalCatalysis Letters
Issue number5-6
Publication statusPublished - Sep 1991



  • bis(pentamethylcyclopentadienyl)thoriumdimethyl
  • hydrogen-deuterium exchange
  • organoactinide complexes
  • Rideal-Eley mechanism

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Catalysis

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