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Table 1

PAH successive hydrogenation energy barriers () in Kelvin.

Hydrogenation level Outer edge Edge Center Ref.
PAH-H 116 1740 2553 (a)
         
692 (b)
         
324 (c)
         
PAH-H2 348 2669 3365 (a)
         
0 (b)
         
0 (c)
         
PAH-H3 348 (b)
         
533 (c)
         
PAH-H4 0 (b)
         
0 (c)
         
PAH-H5 0 (b)
         
742 (c)
         
PAH-H6 0 (b)
         
0 (c)
         
PAH-H7 0 (b)
         
406 (c)
PAH-H8 0 (b)
0 (c)
PAH-H9 348 (c)
PAH-H10 0 (c)
PAH-H11 603 (c)
PAH-H12 0 (c)
PAH-H13 382 (c)
PAH-H14 0 (c)
PAH-H15 382 (c)
PAH-H16 0 (c)
PAH-H17 452 (c)
PAH-H18 0 (c)

Notes. The adopted values are shown in bold face.

References. (a) Cazaux et al. (2016) for PAH cations; (b)Rauls & Hornekær (2008); (c) Boschman et al. (2015), the values are for coronone C24 H12.

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