Thermal dissociation of chromium hexacarbonyl and its decomposition products—Unsaturated carbonyls
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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.
KeywordsDissociation Energy Bond Dissociation Energy Incident Shock Wave Thermal Dissociation Dissociation Rate Constant
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- 2.J. P. Collman, L. S. Hegedus, J. R. Norton, and R. G. Finke, Principles and Applications of Organ-otransition Metal Chemistry (Univ. Sci. Books, California, 1987).Google Scholar
- 8.V. N. Smirnov, Kinet. Katal. 34, 591 (1993).Google Scholar
- 10.H. J. Mick, P. Roth, and V. N. Smirnov, Kinet. Katal. 37, 5 (1996) [Kinet. Catal. 37, 1 (1996)].Google Scholar
- 13.M. Quack and J. Troe, in Unimolecular Reactions and Energy Transfer of Highly Excited Molecules. Reaction Kinetics. Specialist Periodical Reports, Ed. by P. O. Ashmore and R. J. Donovan (The Chemical Soc., London, 1977), Vol. 2, ch. 5, p. 175.Google Scholar
- 15.T. A. Seder, S. P. Church, and E. Weitz, J. Am. Chem. Soc. 108, 4121 (1986).Google Scholar