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CH 3 Br; CH n + + Br energetics agust,www,....ch3br/PPT-110809ak

CH 3 Br; CH n + + Br energetics agust,www,....ch3br/PPT-110809ak.ppt. http://webbook.nist.gov/cgi/cbook.cgi?ID=C2229074&Units=SI&Mask=20#Ion-Energetics. => IE(CH3) = 9.84 ± 0.01 eV &. Appearance energy determinations Ion AE (eV) Other Products Method Reference Comment

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CH 3 Br; CH n + + Br energetics agust,www,....ch3br/PPT-110809ak

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  1. CH3Br; CHn+ + Br energetics agust,www,....ch3br/PPT-110809ak.ppt

  2. http://webbook.nist.gov/cgi/cbook.cgi?ID=C2229074&Units=SI&Mask=20#Ion-Energeticshttp://webbook.nist.gov/cgi/cbook.cgi?ID=C2229074&Units=SI&Mask=20#Ion-Energetics => IE(CH3) = 9.84 ± 0.01 eV & Appearance energy determinations Ion AE (eV) Other Products Method Reference Comment CH+ 15.58 ± 0.30 H2 EI Waldron, 1956 RDSH CH2+ 15.09 ± 0.03 H PI Chupka and Lifshitz, 1968 RDSH http://hyperphysics.phy-astr.gsu.edu/HBASE/Tables/diatomic.html => DE (H2) = 4.5 eV http://hyperphysics.phy-astr.gsu.edu/hbase/molecule/hmol.html => DE (H2) = 4.52 eV

  3. Energy CH+ + 2H + Br 4.5eV CH+ + H2 + Br 15.58 +4.5= 20.08 eV CH2+ + H + Br CH3+ + Br 15.58 eV 15.09 eV 9.84 eV CH3 + Br CH3Br DE(CH3-Br) 0

  4. HRH: change values to cm-1 and add to “energetic figure” for CH3Br

  5. Molecular Spectra and Molecular Structure; Constants of diatomci molecules By Huber and herzberg, (1979)....page 144: DE(CH+) (for formation of C+ + H) = 4.085 eV

  6. C+ + 3H + Br Energy 4.085eV 20.08 + 4.085= 24.17 eV CH+ + 2H + Br 4.5eV CH+ + H2 + Br 15.58 +4.5= 20.08 eV CH2+ + H + Br 15.58 eV CH3+ + Br 15.09 eV 9.84 eV CH3 + Br CH3Br DE(CH3-Br) 0

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