Russian Journal of Physical Chemistry B

, Volume 4, Issue 3, pp 423–427 | Cite as

Thermal dissociation of chromium hexacarbonyl and its decomposition products—Unsaturated carbonyls

Kinetics and Mechanism of Chemical Reactions. Catalysis


The thermal dissociation of chromium hexacarbonyl was studied behind incident shock waves by means of molecular and atomic resonance absorption spectroscopies. The results obtained by these two methods were found to be in close agreement with each other and with the published data on the laser pyrolysis of this compound. A joint interpretation of the experimental results on Cr(CO)6 dissociation obtained in the present work and the available data on the recombination of CO molecules with unsaturated chromium carbonyls, Cr(CO)5 and Cr(CO)4, within the framework of the Rice-Ramsperger-Kassel-Marcus theory made it possible to estimate the bond dissociation energies of all six ligands and to determine, for the first time, the corresponding dissociation rate constants in the low- and high-pressure limits.


Dissociation Energy Bond Dissociation Energy Incident Shock Wave Thermal Dissociation Dissociation Rate Constant 
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© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  1. 1.Semenov Institute of Chemical PhysicsRussian Academy of SciencesMoscowRussia

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