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

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


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 (US)
Pages (from-to)363-368
Number of pages6
JournalCatalysis Letters
Issue number5-6
StatePublished - Sep 1991


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

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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