THE PHOTOLYTIC AND PHOTOSENSITIZED DECOMPOSITION OF CHLOROFORM

  • Unger I
  • Semeluk G
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Abstract

The photolysis of CHCl 3 , in the vapor phase, was carried out using the 1 849 Å line of Hg as the exciting radiation. The photosensitized reaction was also studied using benzene as a photosensitizer. In the latter case, the exciting wavelength was the 2 537 Å line of mercury, which CHCl 3 does not absorb.The study was primarily concerned with establishing the initial steps of the direct photolysis and photosensitized reactions. Experimental observations rule out a molecular detachment of HCl in both the direct photolysis and photosensitized reactions at the wavelength used. The initial step of the photolysis appears to be a carbon–chlorine bond cleavage, but in the photosensitized reaction a carbon–hydrogen bond break is indicated as the primary step. It is concluded that in neither case does dissociation take place from the ground electronic state.

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Unger, I., & Semeluk, G. P. (1966). THE PHOTOLYTIC AND PHOTOSENSITIZED DECOMPOSITION OF CHLOROFORM. Canadian Journal of Chemistry, 44(12), 1427–1436. https://doi.org/10.1139/v66-211

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