Determination of the branching ratios for the reaction of hot H atoms with BrCN and CICN.
The relative rates for the reaction of translationally energetic H atoms with XCN to yield HNC + X, HCN + X, and HX + CN, where X is Br or Cl, have been determined using time- and frequency-resolved absorption spectroscopy. The H atoms were created with an average translational energy of 92 kJ mol{sup -1} by the laser photolysis of CH{sub 3}SH at a wavelength of 248 nm. The measurements were carried out at a total pressure of several torr. The dominant channel for each reaction system was the production of hydrogen isocyanide, HNC. The relative branching ratios for H + BrCN and H + ClCN were determined to be 0.85/0.13/0.017 and 0.74/0.25/0.01 for the HNC/HCN/HX + CN channels, respectively. The ratio of the total reaction cross sections, {sigma}{sub XCN}, was found to be {sigma}{sub BrCN}/{sigma}{sub ClCN} = 0.84.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 943176
- Report Number(s):
- ANL/CHM/JA-38020; JPCAFH; TRN: US201002%%654
- Journal Information:
- J. Phys. Chem. A, Vol. 105, Issue 24 ; 2001; ISSN 1089-5639
- Country of Publication:
- United States
- Language:
- ENGLISH
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