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Table 2
UDFA and Ohio State Chemical Network rate constantsa.
| Reaction products | α | β | Branch. Fract. |
| × 10-7 | (%) | ||
|
|
|||
| OSU | |||
| CH3CH2O+ + e − → | |||
| CH3 + HCO + H | 1.35 | –0.50 | 45 |
| CH2 + H2CO + H | 1.35 | –0.50 | 45 |
| CH3 + H2CO | 0.150 | –0.50 | 5 |
| CH3CHO + H | 0.150 | –0.50 | 5 |
| Total | 3.00 | –0.50 | 100 |
| UDFA | |||
| CH3CHOH+ + e − → | |||
| CO + CH4 + H | 3.00 | –0.50 | 50 |
| H2CO + CH3 | 1.50 | –0.50 | 25 |
| CH3CHO + H | 1.50 | –0.50 | 25 |
| Total | 6.00 | –0.50 | 100 |
| Current data | |||
| CD3CDOD+ + e − → | |||
| CD3 + DCO + D | ≤ 8.47 | –0.74 | ≤ 77 |
| CD2 + D2CO + D | ≤ 8.47 | –0.74 | ≤ 77 |
| CO + CD4 + D | ≤ 8.47 | –0.74 | ≤ 77 |
| D2CO + CD3 | ≤ 8.47 | –0.74 | ≤ 77 |
| CD3CDO + D | ≤ 3.00 | –0.74 | ≤ 23 |
| Total | 11 | –0.74 | 100 |
| OSU | |||
| → | |||
| CH3 + CH2 + OH + H | 6.75 | –0.50 | 74.4 |
| CH3 + CH2 + H2O | 0.675 | –0.50 | 7.4 |
| C2H5 + OH + H | 0.675 | –0.50 | 7.4 |
| C2H4 + H2O + H | 0.675 | –0.50 | 7.4 |
| C2H5 + H2O | 0.150 | –0.50 | 1.7 |
| C2H5OH + H | 0.150 | –0.50 | 1.7 |
| Total | 9.075 | –0.50 | 100 |
| UDFA | |||
| → | |||
| C2H4 + H2O + H | 1.50 | –0.50 | 50 |
| C2H5OH + H | 1.50 | –0.50 | 50 |
| Total | 3.00 | –0.50 | 100 |
| Current data | |||
| → | |||
| CH3 + CH2 + OH + H | 0 | –0.73 | 0 |
| CH3 + CH2 + H2O | 0 | –0.73 | 0 |
| C2H5 + OH + H | ≤ 17.7 | –0.73 | ≤ 93 |
| C2H5 + H2O | ≤ 17.7 | –0.73 | ≤ 93 |
| C2H4 + H2O + H | ≤ 17.7 | –0.73 | ≤ 93 |
| C2H5OH + H | ≤ 1.3 | –0.73 | ≤ 7 |
| Total | 19 | –0.73 | 100 |
Notes. (a) Where k(T) = α*(T/300)β cm3 s-1 and their implied branching fractions. These are compared to the product channel upper limits of the current data.
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