IUPAC Subcommittee on Gas Kinetic Data Evaluation

Providing evaluated kinetic data on the web since 1999.

IUPAC Subcommittee on Gas Kinetic Data Evaluation

Website: http://www.iupac-kinetic.ch.cam.ac.uk/ See website for latest evaluated data. Datasheets can be downloaded for personal use only and must not be retransmitted or disseminated either electronically or in hardcopy without explicit written permission.

This datasheet last evaluated: 2002-03-09 ; last change in preferred values: 2002-03-09 ; last peer-reviewed publication: 2004-03-09


HO + NO + MHONO + M(1) Δ Hο = -207.0 kJ mol-1

Rate Coefficient Data: Low-pressure rate coefficients

Absolute Rate Coefficients

Rate Coefficient (k0) / Temperature / ReferenceTechniques and Comments
cm3molecule-1s-1Kelvin
(1.1 ± 0.1)×10 -30 [N 2 ]293Burrows et al., 1983DF-RF
(7.0 ± 2.0)×10 -31 (T/300) -(2.6±0.3) [N 2 ]90–220Atkinson and Smith, 1994DF-LIF (a)
8.9×10 -31 (T/298) -2.1 [N 2 ]80–301Sharkey et al., 1994PLP-LIF (b)

Comments

(a) HO radicals were generated by a cold cathode discharge and detected by LIF. The experiments were carried out in a supersonic expansion at total pressures corresponding to 10 16 to 10 18 molecule cm -3 .

(b) Experiments were carried out in a cryogenically cooled cell and in a supersonic expansion. At 52 K, rate coefficients have been determined at total gas densities from 5.1×10 16 to 8.2×10 17 molecule cm -3 .

Preferred Values

k0cm3molecule-1s-1{7.5-31 N_2[N2] 7.5×10-31±0.10 N_2[N2]   if   T 298 7.4-31 T 300 PlusMinus -2.4 0.5 N_2[N2]7.4×10-31 (T/ 300 )( -2.4 ±0.5) N_2[N2]  if   200 T 400

Comments on Preferred Values

The preferred values are derived following the analysis given in Forster et al. (1995) of data from Burrows et al. (1983), Atkinson and Smith (1994), Sharkey et al. (1994), Anderson and Kaukman (1972), Stuhl and Niki (1972), Morley and Smith (1972), Westenberg and deHaas (1972), Anderson et al. (1974), Howard and Evenson (1974), Harris and Wayne (1975), Atkinson et al. (1975), Overend et al. (1976) and Anastasi and Smith (1978), and from measurements of the falloff curve with M=He from Forster et al. (1995) and other bath gases from Zabarnick (1993). For measurements of k 0 in the bath gas SF 6 , see Pagsberg et al. (1997).

Rate Coefficient Data: High-pressure rate coefficients

Absolute Rate Coefficients

Rate Coefficient (k) / Temperature / ReferenceTechniques and Comments
cm3molecule-1s-1Kelvin
3.0×10 -11 298Zabarnick, 1993PLP-LIF (a)
3.3×10 -11 298Forster et al., 1995PLP-LIF (b)
3.3×10 -11 (T/300) -0.3 250–400Fulle et al., 1998PLP-LIF (c)

Comments

(a) Falloff extrapolations with M=Ar and SF 6 at pressures below 1 bar.

(b) Measurements in He up to 200 bar using saturated LIF for detection.

(c) see (b); measurements in the bath gas He over the range 5–150 bar.

Preferred Values

kcm3molecule-1s-1{3.3-113.3×10-11±0.2  if   T 298 3.3-11 T 300 -0.3 3.3×10-11 (T/ 300 ) -0.3   if   200 T 400

Comments on Preferred Values

The preferred values are taken from the determination and analysis of the complete falloff curve from Forster et al. (1995) and Fulle et al. (1998). The falloff curve corresponds to F c (300 K) = 0.81. The measurements at pressures below 1 bar of the low pressure parts of the falloff curves from Zabarnick (1993) and Donahue et al. (1997) are consistent with this representation of the falloff curve.

References

  • Anastasi, C. and Smith, I. W. M. , J. Chem. Soc. Faraday Trans. 2 , 74 , 1056 , 1978.
  • Anderson, J. G. and Kaufman, F. , Chem. Phys. Lett. , 16 , 375 , 1972.
  • Anderson, J. G., Margitan, J. J. and Kaufman, F. , J. Chem. Phys. , 60 , 3310 , 1974.
  • Atkinson, R., Hansen, D. A. and Pitts Jr., J. N. , J. Chem. Phys. , 62 , 3284 , 1975.
  • Atkinson, D. B. and Smith, M. A. , J. Phys. Chem. , 98 , 5797 , 1994.
  • Burrows, J. P., Wallington, T. J. and Wayne, R. P. , J. Chem. Soc. Faraday Trans. 2 , 79 , 111 , 1983.
  • Donahue, N. M., Dubey, M. K., Mohrschladt, R., Demerjian, K. L. and Anderson, J. G. , J. Geophys. Res. , 102 , 6159 , 1997.
  • Forster, R., Frost, M., Fulle, D., Hamann, H. F., Hippler, H., Schlepegrell, A. and Troe, J. , J. Chem. Phys. , 103 , 2949 , 1995.
  • Fulle, D., Hamann, H. F., Hippler, H. and Troe, J. , J. Chem. Phys. , 108 , 5391 , 1998.
  • Harris, G. W. and Wayne, R. P. , J. Chem. Soc. Faraday Trans. 1 , 71 , 610 , 1975.
  • Howard, C. J. and Evenson, K. M. , J. Chem. Phys. , 61 , 1943 , 1974.
  • Morley, C. and Smith, I. W. M. , J. Chem. Soc. Faraday Trans. , 68 , 1016 , 1972.
  • Overend, R. P., Paraskevopoulos, G. and Black, C. , J. Chem. Phys. , 64 , 4149 , 1976.
  • Pagsberg, P., Bjergbakke, E., Ratajczak, E. and Sillesen, A. , Chem. Phys. Lett. , 272 , 383 , 1997.
  • Sharkey, P., Sims, I. R., Smith, I. W. M., Bocherel, P. and Rowe, B. R. , J. Chem. Soc. Faraday Trans. , 90 , 3609 , 1994.
  • Stuhl, F. and Niki, H. , J. Chem. Phys. , 57 , 3677 , 1972.
  • Westenberg, A. A. and deHaas, N. , J. Chem. Phys. , 57 , 5375 , 1972.
  • Zabarnick, S. , Chem. Phys. , 171 , 265 , 1993.