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Accessibility information
Author(s):   Smirnov, V.N.
Title:   Thermal dissociation of chromium hexacarbonyl and its decomposition products-Unsaturated carbonyls
Journal:   Russ. J. Phys. Chem. B
Volume:   4
Page(s):   423 - 427
Year:   2010
Reference type:   Journal article
Squib:   2010SMI423-427

Reaction:   Cr(CO)2 → CO + CrCO
Reaction order:   1
Temperature:   300 - 1000 K
Rate expression:   2.66x1016 [s-1] (T/298 K)-0.59 e-105000 [J/mole]/RT
Category:  Theory
Data type:   Transition state theory
Pressure dependence:   Rate constant is high pressure limit
Comments:   Dissociation energies of several chromium carbonyl compounds were estimated based on the experimental data for chromium hexacarbonyl decomposition obtained in this work and the literature data on CO recombination with unsaturated chromium carbonyls. RRKM modeling was used for the analysis and for the calculation of the dissociation rate constant in the high and the lowpressure limits.

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Rate constant values calculated from the Arrhenius expression:

T (K)k(T) [s-1]
300 1.38E-2
350 5.16E0
400 4.34E2
450 1.35E4
500 2.10E5
550 1.97E6
600 1.27E7
650 6.12E7
700 2.35E8
750 7.50E8
800 2.07E9
850 5.05E9
900 1.11E10
950 2.26E10
1000 4.26E10