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Home All issues Volume 650 (June 2021) A&A, 650 (2021) A169 Full HTML
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Table 1.

Products obtained from (CH3OH)10-ice mantle in collision with an OH+ projectile with a kinetic energy impact of 10–22 eV.

Reaction N° Step Products Impact energy [eV]
1 1.1 CH2OH+ + H2O 10,12,15,18,20,22
1.2 H2CO + H2O + H+(a)
2 2.1 CH2OH+ + H2O 18,22
2.2 H2CO + H3O+
3 3.1 CH2OH+ + H2O 20,22
3.2 HCOH + H2O + H+
4 4.1 CH2OH+[1] + H2O + CH3OH[2] 15
4.2 CH + 2H2O + H2CO[2] + H+(a)
5 5.1 CH2OH+ + H2O 20
5.2 3H2CO + 2H2 + H+
6 6.1 CH2(OH)2…H+ 18
6.2 CH2OH+ + H2O
6.3 H2CO + H2O + H+(a)
7 7.1 CH2(OH)2…H+[1] + CH3OH[2] 18
7.2 CH2(OH) + CH2OH+[2] + H
7.3 H2CO[1] + H2O[1] + CH2OH+[2]+ H
7.4 H2CO[1] + H2O[1] + H2CO[2] + H+(a)[2] + H
8 8.1 CH2(OH)2…H+[1] + CH3OH[2] 12
8.2 CH2(OH) + CH2OH+[2] + H
8.3 CH2(OH) + H2CO[2] + H+(a)[2] + H
9 9.1 CH2(OH)2…H+[1] + CH3OH[2] 22
9.2 H2CO[1] + H + CH2(OH)2…H+[2]
9.3 H2CO[1] + H + H2CO[2] + H2O[2] + H+(a)[2]
10 10.1 CH2(OH)2…H+[1] + CH3OH[2] 22
10.2 H2CO[1] + H + CH2(OH)2…H+[2]
10.3 H2CO[1] + H + HCOH[2] + H2O[2] + H+(a)[2]
11 11.1 HCO+[1] + H + H2O[1] + CH3OH[2] 15
11.2 H2CO[1, 2] + H + H+[1] + H2O[1, 2] + H2CO[2]
12 12.1 H2COOH+[1] + H + CH3OH[2] 18
12.2 H2CO[1] + H + CH2(OH) + H+(a)[2]
13 13.1 H2COOH+[1] + H + CH3OH[2] 22
13.2 H2CO[1] + H + H2O[1, 2] + CH2OH+[2]
13.3 H2CO[1] + H + H2O[1, 2] + H2CO[2] + H+(a)[2]
14 14.1 H2COOH+[1] + H + CH3OH[2] 22
14.2 H2CO[1] + H + H2O[1, 2] + CH2OH+[2]
14.3 H2CO[1] + H + H2O[1, 2] + HCOH[2] + H+(a)[2]

Notes. [1] and [2] are the first and/or second, methanol molecules involved in the reactions, as well as the origin of their products.

(a)

Corresponds to a proton stabilized by hydrogen bonds with methanol molecules of the ice mantle in a [H…OH…OH…OH]+ fashion.

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