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Author(s):   Enami, S.; Yamanaka, T.; Hashimoto, S.; Kawasaki, M.; Tonokura, K.
Title:   Direct observation of adduct formation of alkyl and aromatic iodides with Cl atoms using cavity ring-down spectroscopy
Journal:   J. Phys. Chem. A
Volume:   109
Page(s):   6066 - 6070
Year:   2005
Reference type:   Journal article
Squib:   2005ENA/YAM6066-6070

Reaction:   CH3I + ·Cl → Adduct
Temperature:   263 K
Rate expression:   no rate data available
Category:  Experiment
Data type:   Mechanistic information only
Pressure dependence:   None reported
Experimental procedure:   Static or low flow - Data taken vs time
Excitation technique:   Flash photolysis (laser or conventional)
Time resolution:   In real time
Analytical technique:   Vis-UV absorption
Comments:   Cl atoms were generated by laser photolysis of Cl2 at 355 nm and allowed to react with the alkyl and aromatic iodide substrates. The visible absorption spectra of the RI-Cl adducts were recorded at 263 K and 440-520 nm. Cavity ring down spectroscopy was used to monitor the decays of the adducts. For the alkyl iodides the absense of an effect of added O2 on the absorbtion spectra was taken as an indication that the spectra pertain to an adduct and not products of H abstraction. Adducts are not observed at higher temperatures and adduct stabilization temperatures are reported.

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