CH3NH2 thermal decomposition is shown to provide a suitable NH2 radical source for spectroscopic and kinetic shock tube studies. Using this precursor, the absorption coefficient of the NH2 radical at a detection wavelength of 16739.90 cm-1 has been determined. In the temperature range 1600-2000 K the low-pressure absorption coefficient is described by the polynominal equation: kNH2 = 3.953×1010/ T3+7.295×105/T2-1.549×103/T[atm-1 cm-1]. The uncertainty of the determined absorption coefficient is estimated to be ±10%. The rate of the thermal decomposition reaction CH3NH2+M→CH3+NH2+M is determined over the temperature range 1550-1900 K and at pressures near 1.6 atm. The rate coefficient was found to be: k1 = 2.51×1016 exp(-28430/T) [cm3 mol-1 s-1]. The uncertainty of the determined rate coefficients is estimated to be ±20%.
|Number of pages||8|
|Journal||International Journal of Chemical Kinetics|
|Publication status||Published - 1999 Jan 1|
All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry