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Table A.1

Chemical reactions with different hydrogenation and charge states of coronene, as shown in the first column.

Hydrogenation Abstraction
Reactant Barrier/meV (K) Reactive sites Barrier/meV (K) Reactive sites

C24H0 12
C24H1 11 10 (116) 1
C24H2 10 10 (116) 2
C24H3 9 10 (116) 3

C24H4 8 10 (116) 4
C24H5 7 10 (116) 5
C24H6 6 10 (116) 6
C24H7 5 10 (116) 7

C24H8 4 10 (116) 8
C24H9 3 10 (116) 9
C24H10 2 10 (116) 10
C24H11 1 10 (116) 11

C24H12 28 (324) 12 10 (116) 12
C24H13 1 1
C24H14 46 (533) 2 10 (116) 2
C24H15 1 1

C24H16 64 (742) 1 10 (116) 4
C24H17 2 1
C24H18 35 (406) 1 10 (116) 6
C24H19 1 1

C24H20 30 (348) 2 10 (116) 8
C24H21 1 1
C24H22 52 (603) 1 10 (116) 10
C24H23 2 1

C24H24 33 (382) 1 10 (116) 12
C24H25 1 1
C24H26 33 (382) 2 10 (116) 14
C24H27 1 1

C24H28 39 (452) 1 10 (116) 16
C24H29 1 1
C24H30 34 (394) 2 10 (116) 18
C24H31 1 1

C24H32 49 (568) 2 10 (116) 20
C24H33 2 1
C24H34 49 (568) 1 10 (116) 22
C24H35 1 1

12
11 10 (116) 1
10 10 (116) 2
9 10 (116) 3

8 10 (116) 4
7 10 (116) 5
6 10 (116) 6
5 10 (116) 7

4 10 (116) 8
3 10 (116) 9
2 10 (116) 10
1 10 (116) 11

12 10 (116) 12
28 (324) 1 1
2 10 (116) 2
46 (533) 1 1

1 10 (116) 4
64 (742) 2 1
1 10 (116) 6
35 (406) 1 1

2 10 (116) 8
30 (348) 1 1
1 10 (116) 10
52 (603) 2 1

1 10 (116) 12
33 (382) 1 1
2 10 (116) 14
33 (382) 1 1

1 10 (116) 16
39 (452) 1 1
2 10 (116) 18
34 (394) 1 1

2 10 (116) 20
49 (568) 2 1
1 10 (116) 22
49 (568) 1 1

C24H36 10 (116) 24
10 (116) 24

Notes. The second and third column show the barrier and number of reactive carbon atoms for addition of a hydrogen atom. The fourth and fifth column show these properties for the process of abstraction, which leads to H2 formation.

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