John D. Simon, Mark Bernstein, Kevin S. Peters, "Application of Photoacoustic Calorimetry to the Photofragmentation of Cr(CO)6", Laser Chemistry, vol. 3, Article ID 454360, 8 pages, 1983. https://doi.org/10.1155/LC.3.215
Application of Photoacoustic Calorimetry to the Photofragmentation of Cr(CO)6
Photolysis of Cr(CO)6 in cyclohexane yields solvated pentacarbonyl species within 25 ps. Using high-speed photoacoustic calorimetry, we have determined the heat of reaction for this photofragmentation, directly measuring the energy required to break a single metal–carbonyl bond followed by solvation of the fragments. The energy required to photochemically dissociate a single CO in cyclohexane exceeds the gas phase average bond dissociation energy by at least 11 kcal/mol. However, the determined heat of reaction agrees well with the activation energies derived from thermal decomposition kinetics.
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