S₂

Diatomic sulphur
Flags: Detected, RATE12
Empirical: S₂
Mass: 64 amu
Heat of formation: 128.3 kJ mol^-1
Added to system: 2003-05-06 06:43:21

5 S₂ formation reactions

	Reaction	α	β	γ	T_l - T_u (K)
1	NO + S₂⁺ → S₂ + NO⁺	5.10e-10	0.00	0.00	10 - 41000
2	HS₂⁺ + e^- → S₂ + H	1.50e-7	-0.50	0.00	10 - 300
3	H₂S + HS₂⁺ → S₂ + H₃S⁺	2.90e-10	-0.50	0.00	10 - 41000
4	S + HS → S₂ + H	4.50e-11	0.00	0.00	10 - 300
5	S + SO → S₂ + O	1.73e-11	0.50	11500.00	383 - 41000

	Reaction	α	β	γ	T_l - T_u (K)
1	H⁺ + S₂ → S₂⁺ + H	3.00e-9	0.00	0.00	10 - 300
2	S₂ + CRPHOT → S + S	1.30e-17	0.00	250.00	10 - 41000
3	H₃⁺ + S₂ → HS₂⁺ + H₂	2.00e-9	0.00	0.00	10 - 41000
4	H₃O⁺ + S₂ → HS₂⁺ + H₂O	2.00e-9	0.00	0.00	10 - 41000
5	HCO⁺ + S₂ → HS₂⁺ + CO	2.00e-9	0.00	0.00	10 - 41000
6	He⁺ + S₂ → S⁺ + S + He	2.00e-9	0.00	0.00	10 - 41000
7	C + S₂ → CS + S	7.00e-11	0.00	0.00	10 - 300
8	H + S₂ → HS + S	2.25e-10	0.50	8355.00	278 - 300
9	N + S₂ → NS + S	1.73e-11	0.50	4000.00	133 - 300
10	O + S₂ → SO + S	1.70e-11	0.00	0.00	298 - 2500
11	S₂ + PHOTON → S₂⁺ + e^-	6.20e-12	0.00	3.10	10 - 41000
12	S₂ + PHOTON → S + S	3.30e-10	0.00	1.40	10 - 41000

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

S2