Table 1: Fractionation reactions added to the list given in Roberts & Millar (2000a). The forward rate is $k_{\rm f}$; the reverse rate, $k_{\rm r}$, is given by $k_{\rm f}$ e $^{-\gamma /{\rm T}}$.
Reaction     $k_{\rm f}$ $\gamma$ Ref.
      (cm3 s-1) (K)  
H3+ +  D2 $\rightleftharpoons$  H2D+ + HD 3.5(-10) 63 1
H3+ +  D2 $\rightleftharpoons$  HD2+ + H2 1.1(-9) 251 1
H2D+ +  HD $\rightleftharpoons$  HD2+ + H2 8.1(-10) 187 1
H2D+ +  D2 $\rightleftharpoons$  HD2+ + HD 7.0(-10) 107 1
H2D+ + D2 $\rightleftharpoons$  D3+ +  H2 7.0(-10) 341 1
HD2+ + HD $\rightleftharpoons$  D3+ + H2 6.4(-10) 234 1
HD2+ + D2 $\rightleftharpoons$  D3+ + HD 8.7(-10) 159 1
CH2D+ + HD $\rightleftharpoons$ CHD2+ + H2 1.6(-9) 370 2
CHD2+ + HD $\rightleftharpoons$ CD3+ + H2 1.5(-9) 370 2
CH3+ + D2 $\rightleftharpoons$ CH2D+ + HD 4.4(-10) 400 2
  $\rightleftharpoons$ CHD2+ + H2 6.6(-10) 400 2
CH2D+ + D2 $\rightleftharpoons$ CHD2+ + HD 1.2(-9) 400 2
H2D+ + D $\rightleftharpoons$  HD2+ + H 2.0(-9) 550 3
HD2+ + D $\rightleftharpoons$  D3+ + H 2.0(-9) 655 3
Note: a(-b) stands for $a\times10^{-b}$.
Refs.: 1. Giles et al. (1992); 2. Smith et al. (1982a,b); 3. Walmsley et al. (2004).


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