C₈H₂

1,3,5,7-Octatetrayne
Flags: RATE12
Empirical: C₈H₂
Mass: 98 amu
Heat of formation: 864.0 kJ mol^-1
Added to system: 2003-05-06 06:43:21

7 C₈H₂ formation reactions

	Reaction	α	β	T_l - T_u (K)
1	H + C₈H^- → C₈H₂ + e^-	1.00e-9	0.00	10 - 300
2	C₈H₃⁺ + e^- → C₈H₂ + H	1.00e-6	-0.30	10 - 300
3	C₈H₄⁺ + e^- → C₈H₂ + H₂	1.00e-6	-0.30	10 - 300
4	C₈H₅⁺ + e^- → C₈H₂ + H₂ + H	1.50e-7	-0.50	10 - 300
5	O + C₉H₃⁺ → C₈H₂ + HCO⁺	2.00e-10	0.00	10 - 41000
6	C₂H + C₆H₂ → C₈H₂ + H	1.06e-10	-0.25	10 - 300
7	C + C₇H₄ → C₈H₂ + H₂	8.00e-10	0.17	10 - 300

	Reaction	α	β	γ	T_l - T_u (K)
1	H⁺ + C₈H₂ → C₈H₂⁺ + H	2.00e-9	-0.50	0.00	10 - 300
2	C₈H₂ + CRPHOT → C₈H + H	1.30e-17	0.00	875.00	10 - 41000
3	C⁺ + C₈H₂ → C₉⁺ + H₂	1.20e-9	-0.50	0.00	10 - 41000
4	C⁺ + C₈H₂ → C₉H⁺ + H	1.20e-9	-0.50	0.00	10 - 41000
5	C₂H₂⁺ + C₈H₂ → C₁₀H₂⁺ + H₂	1.00e-9	0.00	0.00	10 - 41000
6	C₂H₂⁺ + C₈H₂ → C₁₀H₃⁺ + H	1.00e-9	0.00	0.00	10 - 41000
7	CH₃⁺ + C₈H₂ → C₉H₃⁺ + H₂	1.20e-9	-0.50	0.00	10 - 41000
8	H⁺ + C₈H₂ → C₈H⁺ + H₂	2.00e-9	-0.50	0.00	10 - 41000
9	H₃⁺ + C₈H₂ → C₈H₃⁺ + H₂	2.00e-9	-0.50	0.00	10 - 41000
10	HCO⁺ + C₈H₂ → C₈H₃⁺ + CO	1.40e-9	-0.50	0.00	10 - 41000
11	He⁺ + C₈H₂ → C₆H⁺ + C₂H + He	1.00e-9	-0.50	0.00	10 - 41000
12	He⁺ + C₈H₂ → C₈⁺ + He + H₂	1.00e-9	-0.50	0.00	10 - 41000
13	He⁺ + C₈H₂ → C₈H⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
14	C₂H + C₈H₂ → C₁₀H₂ + H	1.00e-10	0.00	0.00	10 - 41000
15	C + C₈H₂ → C₉H + H	9.00e-10	0.00	0.00	10 - 300
16	CN + C₈H₂ → HC₉N + H	2.72e-10	-0.52	19.00	10 - 300
17	C₈H₂ + PHOTON → C₈H₂⁺ + e^-	2.00e-10	0.00	2.50	10 - 41000
18	C₈H₂ + PHOTON → C₈H + H	1.00e-9	0.00	1.70	10 - 41000

Variation of log fractional abundance (relative to H₂) with log time (years) in a dark cloud model. Ref. RATE12 paper.

C8H2