Table 6: The reactions whose 10 K rate coefficient has changed the most between the current and previous releases of the database. In most cases this is due to new data for the reaction being available. The reference codes follow our usual convention.
  RATE06 RATE99
Reaction $\alpha $ $\beta $ $\gamma $ Reference $\alpha $ $\beta $ $\gamma $ Reference

Biggest rate coefficient decrease

C2H4 + C3H $_3^+\rightarrow$ C5H5+ + H2		 1.10E-19 0.00 0.0 0001 1.10e-09 0.00 0.0 HL89
C2H3 + O $_2\rightarrow$ H2CO + HCO 4.62E-12 0.00 -171.0 NIST 2.73e-11 -1.39 510.0 NIST
OH + CO $\rightarrow$ CO2 + H 2.81E-13 0.00 176.0 SH04 1.17e-13 0.95 -74.0 NIST
H+ + H $\rightarrow$ H2+ + $h\nu$ 5.13E-19 1.85 0.0 N/A 1.00e-17 0.00 0.0 PH80
OH + OH $\rightarrow$ H2O + O 1.65E-12 1.14 50.0 SH04 3.87e-13 1.69 -469.0 NIST
H + CH $\rightarrow$ C + H2 1.31E-10 0.00 80.0 NIST 2.70e-11 0.38 0.0 HG93
CH2+ + $h\nu \rightarrow$ CH+ + H 4.60E-11 0.00 1.8 VD06 1.70e-09 0.00 1.7  

Biggest rate coefficient increase

O + NS $\rightarrow$ SO + N		 1.00E-11 0.00 0.0 SH04 1.73e-11 0.50 4000.0 MI84
O + C6H $\rightarrow$ C5H + CO 1.70E-11 0.00 0.0 SH04 1.00e-10 0.00 250.0 HL89
O + C7H $\rightarrow$ C6H + CO 1.70E-11 0.00 0.0 SH04 1.00e-10 0.00 250.0 HL89
O + C8H $\rightarrow$ C7H + CO 1.70E-11 0.00 0.0 SH04 1.00e-10 0.00 250.0 HL89
O + C9H $\rightarrow$ C8H + CO 1.70E-11 0.00 0.0 SH04 1.00e-10 0.00 250.0 HL89
O + C3H $\rightarrow$ CO + C2H 1.70E-11 0.00 0.0 SH04 1.00e-10 0.00 250.0 HL89
O + C4H $\rightarrow$ C3H + CO 1.70E-11 0.00 0.0 SH04 1.00e-10 0.00 250.0 HL89
O + C5H $\rightarrow$ C4H + CO 1.70E-11 0.00 0.0 SH04 1.00e-10 0.00 250.0 HL89
N + C4H $_2^+\rightarrow $ HC4N+ + H 9.50E-12 0.00 0.0 9902 1.00e-18 0.00 0.0  
CN + O $_2\rightarrow$ NO + CO 5.01E-12 -0.46 -8.0 NIST 5.30e-13 0.00 0.0  


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