Laser Chemistry

Laser Chemistry / 1983 / Article

Open Access

Volume 3 |Article ID 454360 |

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.

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.

Copyright © 1983 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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