He

Helium
Flags: RATE12
Empirical: He
Mass: 4 amu
Added to system: 2003-05-06 06:43:21

342 He formation reactions

	Reaction	α	β	γ	T_l - T_u (K)
1	H₂ + He⁺ → He + H₂⁺	7.20e-15	0.00	0.00	10 - 300
2	H + He⁺ → He + H⁺	1.20e-15	0.25	0.00	10 - 41000
3	He⁺ + C₁₀ → C₁₀⁺ + He	1.50e-9	0.00	0.00	10 - 41000
4	He⁺ + C₁₀H → C₁₀H⁺ + He	1.50e-8	-0.50	0.00	10 - 41000
5	He⁺ + C₂ → C₂⁺ + He	5.00e-10	0.00	0.00	10 - 41000
6	He⁺ + C₂H₂ → C₂H₂⁺ + He	2.54e-10	0.00	0.00	10 - 41000
7	He⁺ + C₂H₄ → C₂H₄⁺ + He	2.40e-10	0.00	0.00	10 - 41000
8	He⁺ + C₂H₅ → C₂H₅⁺ + He	5.00e-10	0.00	0.00	10 - 41000
9	He⁺ + C₃N → C₃N⁺ + He	8.20e-9	-0.50	0.00	10 - 41000
10	He⁺ + C → C⁺ + He	6.30e-15	0.75	0.00	10 - 300
11	He⁺ + CH₄ → CH₄⁺ + He	5.10e-11	0.00	0.00	10 - 41000
12	He⁺ + CH → CH⁺ + He	5.00e-10	-0.50	0.00	10 - 41000
13	He⁺ + CO₂ → CO₂⁺ + He	1.21e-10	0.00	0.00	10 - 41000
14	He⁺ + H₂CO → H₂CO⁺ + He	9.69e-10	-0.50	0.00	10 - 300
15	He⁺ + H₂O → H₂O⁺ + He	6.05e-11	-0.50	0.00	10 - 41000
16	He⁺ + H₂S → H₂S⁺ + He	3.08e-10	-0.50	0.00	10 - 41000
17	He⁺ + HCNO → HCNO⁺ + He	8.39e-9	-0.50	0.00	10 - 300
18	He⁺ + HNCO → HNCO⁺ + He	5.68e-9	-0.50	0.00	10 - 300
19	He⁺ + HONC → HONC⁺ + He	1.03e-8	-0.50	0.00	10 - 300
20	He⁺ + N₂ → N₂⁺ + He	6.40e-10	0.00	0.00	10 - 41000
21	He⁺ + NH₃ → NH₃⁺ + He	2.64e-10	-0.50	0.00	10 - 41000
22	He⁺ + O₂ → O₂⁺ + He	3.30e-11	0.00	0.00	10 - 41000
23	He⁺ + P → P⁺ + He	1.00e-9	0.00	0.00	10 - 300
24	He⁺ + SO₂ → SO₂⁺ + He	4.30e-10	-0.50	0.00	10 - 41000
25	He⁺ + Si → Si⁺ + He	3.30e-9	0.00	0.00	10 - 41000
26	HeH⁺ + e^- → He + H	1.00e-8	-0.60	0.00	10 - 300
27	H₂ + He⁺ → He + H⁺ + H	3.70e-14	0.00	35.00	10 - 300
28	H₂ + HeH⁺ → He + H₃⁺	1.50e-9	0.00	0.00	10 - 41000
29	H + HeH⁺ → He + H₂⁺	9.10e-10	0.00	0.00	10 - 41000
30	HNC₃ + He⁺ → C₂⁺ + HNC + He	2.00e-9	-0.50	0.00	10 - 41000
31	HNC₃ + He⁺ → C₂NH⁺ + C + He	2.00e-9	-0.50	0.00	10 - 41000
32	HNC₃ + He⁺ → C₃⁺ + NH + He	2.00e-9	-0.50	0.00	10 - 41000
33	HNC₃ + He⁺ → C₃ + NH⁺ + He	2.00e-9	-0.50	0.00	10 - 41000
34	HNC₃ + He⁺ → C₃N⁺ + H + He	2.00e-9	-0.50	0.00	10 - 41000
35	He⁺ + C₁₀ → C₅⁺ + C₅ + He	5.25e-11	0.00	0.00	10 - 41000
36	He⁺ + C₁₀ → C₆⁺ + C₃ + C + He	3.58e-10	0.00	0.00	10 - 41000
37	He⁺ + C₁₀ → C₆⁺ + C₄ + He	2.70e-11	0.00	0.00	10 - 41000
38	He⁺ + C₁₀ → C₇⁺ + C₃ + He	8.19e-10	0.00	0.00	10 - 41000
39	He⁺ + C₁₀ → C₈⁺ + C₂ + He	1.82e-10	0.00	0.00	10 - 41000
40	He⁺ + C₁₀ → C₉⁺ + C + He	4.20e-11	0.00	0.00	10 - 41000
41	He⁺ + C₁₀H₂ → C₁₀⁺ + H + H + He	2.19e-10	0.00	0.00	10 - 41000
42	He⁺ + C₁₀H₂ → C₅H⁺ + C₅H + He	1.65e-11	0.00	0.00	10 - 41000
43	He⁺ + C₁₀H₂ → C₇H⁺ + C₃ + H + He	5.07e-10	0.00	0.00	10 - 41000
44	He⁺ + C₁₀H₂ → C₇H⁺ + C₃H + He	4.65e-11	0.00	0.00	10 - 41000
45	He⁺ + C₁₀H₂ → C₉H⁺ + C + H + He	6.79e-10	0.00	0.00	10 - 41000
46	He⁺ + C₁₀H → C₅H⁺ + C₃ + C₂ + He	3.75e-10	-0.50	0.00	10 - 41000
47	He⁺ + C₁₀H → C₅H⁺ + C₅ + He	1.13e-9	-0.50	0.00	10 - 41000
48	He⁺ + C₁₀H → C₇⁺ + C₃ + H + He	4.73e-9	-0.50	0.00	10 - 41000
49	He⁺ + C₁₀H → C₇H⁺ + C₂ + C + He	4.80e-10	-0.50	0.00	10 - 41000
50	He⁺ + C₁₀H → C₇H⁺ + C₃ + He	4.05e-9	-0.50	0.00	10 - 41000
51	He⁺ + C₁₀H → C₉⁺ + C + H + He	3.83e-9	-0.50	0.00	10 - 41000
52	He⁺ + C₂ → C⁺ + C + He	1.60e-9	0.00	0.00	10 - 41000
53	He⁺ + C₂H₂ → C₂⁺ + He + H₂	1.61e-9	0.00	0.00	10 - 41000
54	He⁺ + C₂H₂ → C₂H⁺ + He + H	8.75e-10	0.00	0.00	10 - 41000
55	He⁺ + C₂H₂ → CH⁺ + CH + He	7.70e-10	0.00	0.00	10 - 41000
56	He⁺ + C₂H₃ → C₂H⁺ + He + H₂	1.00e-9	-0.50	0.00	10 - 41000
57	He⁺ + C₂H₃ → C₂H₂⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
58	He⁺ + C₂H₄ → C₂H⁺ + He + H₂ + H	4.40e-10	0.00	0.00	10 - 41000
59	He⁺ + C₂H₄ → C₂H₂⁺ + He + H₂	2.20e-9	0.00	0.00	10 - 41000
60	He⁺ + C₂H₄ → C₂H₃⁺ + He + H	1.70e-10	0.00	0.00	10 - 41000
61	He⁺ + C₂H₄ → CH₂⁺ + CH₂ + He	4.80e-10	0.00	0.00	10 - 41000
62	He⁺ + C₂H₅ → C₂H₃⁺ + He + H₂	5.00e-10	0.00	0.00	10 - 41000
63	He⁺ + C₂H₅ → C₂H₄⁺ + He + H	5.00e-10	0.00	0.00	10 - 41000
64	He⁺ + C₂H₅OH → C₂H₅⁺ + OH + He	3.00e-9	-0.50	0.00	10 - 41000
65	He⁺ + C₂H → C₂⁺ + He + H	5.10e-10	0.00	0.00	10 - 41000
66	He⁺ + C₂H → CH⁺ + C + He	5.10e-10	0.00	0.00	10 - 41000
67	He⁺ + C₂H → CH + C⁺ + He	5.10e-10	0.00	0.00	10 - 41000
68	He⁺ + C₂N → CN + C⁺ + He	8.00e-9	0.00	0.00	10 - 41000
69	He⁺ + C₂O → CO + C⁺ + He	1.00e-9	-0.50	0.00	10 - 41000
70	He⁺ + C₂S → CS⁺ + C + He	2.50e-10	-0.50	0.00	10 - 41000
71	He⁺ + C₂S → CS + C⁺ + He	2.50e-10	-0.50	0.00	10 - 41000
72	He⁺ + C₂S → S⁺ + C₂ + He	2.50e-10	-0.50	0.00	10 - 41000
73	He⁺ + C₂S → S + C₂⁺ + He	2.50e-10	-0.50	0.00	10 - 41000
74	He⁺ + C₃ → C₂ + C⁺ + He	2.00e-9	0.00	0.00	10 - 41000
75	He⁺ + C₃H₂ → C₃H⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
76	He⁺ + C₃H → C₃⁺ + He + H	2.00e-9	-0.50	0.00	10 - 41000
77	He⁺ + C₃N → CN + C₂⁺ + He	8.00e-9	-0.50	0.00	10 - 41000
78	He⁺ + C₃O → C₃⁺ + O + He	1.00e-9	-0.50	0.00	10 - 41000
79	He⁺ + C₃O → CO + C₂⁺ + He	1.00e-9	-0.50	0.00	10 - 41000
80	He⁺ + C₃P → C₃⁺ + P + He	5.00e-10	-0.50	0.00	10 - 41000
81	He⁺ + C₃P → C₃ + P⁺ + He	5.00e-10	-0.50	0.00	10 - 41000
82	He⁺ + C₃S → CS⁺ + C₂ + He	5.00e-10	-0.50	0.00	10 - 41000
83	He⁺ + C₃S → CS + C₂⁺ + He	5.00e-10	-0.50	0.00	10 - 41000
84	He⁺ + C₄ → C₂⁺ + C₂ + He	6.70e-10	0.00	0.00	10 - 41000
85	He⁺ + C₄ → C₃⁺ + C + He	6.70e-10	0.00	0.00	10 - 41000
86	He⁺ + C₄ → C₃ + C⁺ + He	6.70e-10	0.00	0.00	10 - 41000
87	He⁺ + C₄H₃ → C₃H₂⁺ + CH + He	6.70e-10	0.00	0.00	10 - 300
88	He⁺ + C₄H₃ → C₃H₃⁺ + C + He	6.70e-10	0.00	0.00	10 - 300
89	He⁺ + C₄H₃ → C₄H₂⁺ + He + H	6.70e-10	0.00	0.00	10 - 300
90	He⁺ + C₄H → C₂H⁺ + C₂ + He	1.00e-9	-0.50	0.00	10 - 41000
91	He⁺ + C₄H → C₄⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
92	He⁺ + C₄P → CCP⁺ + C₂ + He	5.00e-10	-0.50	0.00	10 - 41000
93	He⁺ + C₄P → CCP + C₂⁺ + He	5.00e-10	-0.50	0.00	10 - 41000
94	He⁺ + C₄S → CS⁺ + C₃ + He	5.00e-10	-0.50	0.00	10 - 41000
95	He⁺ + C₄S → CS + C₃⁺ + He	5.00e-10	-0.50	0.00	10 - 41000
96	He⁺ + C₅ → C₃⁺ + C₂ + He	1.00e-9	0.00	0.00	10 - 41000
97	He⁺ + C₅ → C₄⁺ + C + He	1.00e-9	0.00	0.00	10 - 41000
98	He⁺ + C₅H₂ → C₃H⁺ + C₂H + He	1.00e-9	-0.50	0.00	10 - 41000
99	He⁺ + C₅H₂ → C₅⁺ + He + H₂	1.00e-9	-0.50	0.00	10 - 41000
100	He⁺ + C₅H₂ → C₅H⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
101	He⁺ + C₅H → C₃H⁺ + C₂ + He	1.50e-9	-0.50	0.00	10 - 41000
102	He⁺ + C₅H → C₅⁺ + He + H	1.50e-9	-0.50	0.00	10 - 41000
103	He⁺ + C₅N → C₄⁺ + CN + He	3.00e-9	-0.50	0.00	10 - 41000
104	He⁺ + C₆ → C₄⁺ + C₂ + He	1.40e-9	0.00	0.00	10 - 41000
105	He⁺ + C₆ → C₅⁺ + C + He	1.40e-9	0.00	0.00	10 - 41000
106	He⁺ + C₆H₂ → C₄H⁺ + C₂H + He	1.00e-9	-0.50	0.00	10 - 41000
107	He⁺ + C₆H₂ → C₆⁺ + He + H₂	1.00e-9	-0.50	0.00	10 - 41000
108	He⁺ + C₆H₂ → C₆H⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
109	He⁺ + C₆H₆ → C₅H₅⁺ + CH + He	7.00e-10	0.00	0.00	10 - 300
110	He⁺ + C₆H₆ → C₆H₅⁺ + He + H	7.00e-10	0.00	0.00	10 - 300
111	He⁺ + C₆H → C₄H⁺ + C₂ + He	1.40e-9	-0.50	0.00	10 - 41000
112	He⁺ + C₆H → C₆⁺ + He + H	1.40e-9	-0.50	0.00	10 - 41000
113	He⁺ + C₇ → C₅⁺ + C₂ + He	1.40e-9	0.00	0.00	10 - 41000
114	He⁺ + C₇ → C₆⁺ + C + He	1.40e-9	0.00	0.00	10 - 41000
115	He⁺ + C₇H₂ → C₅H⁺ + C₂H + He	1.00e-9	-0.50	0.00	10 - 41000
116	He⁺ + C₇H₂ → C₇⁺ + He + H₂	1.00e-9	-0.50	0.00	10 - 41000
117	He⁺ + C₇H₂ → C₇H⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
118	He⁺ + C₇H → C₅H⁺ + C₂ + He	2.00e-9	-0.50	0.00	10 - 41000
119	He⁺ + C₇H → C₇⁺ + He + H	2.00e-9	-0.50	0.00	10 - 41000
120	He⁺ + C₇N → C₆⁺ + CN + He	3.00e-9	-0.50	0.00	10 - 41000
121	He⁺ + C₈ → C₆⁺ + C₂ + He	1.50e-9	0.00	0.00	10 - 41000
122	He⁺ + C₈ → C₇⁺ + C + He	1.50e-9	0.00	0.00	10 - 41000
123	He⁺ + C₈H₂ → C₆H⁺ + C₂H + He	1.00e-9	-0.50	0.00	10 - 41000
124	He⁺ + C₈H₂ → C₈⁺ + He + H₂	1.00e-9	-0.50	0.00	10 - 41000
125	He⁺ + C₈H₂ → C₈H⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
126	He⁺ + C₈H → C₆H⁺ + C₂ + He	1.50e-9	-0.50	0.00	10 - 41000
127	He⁺ + C₈H → C₈⁺ + He + H	1.50e-9	-0.50	0.00	10 - 41000
128	He⁺ + C₉ → C₇⁺ + C₂ + He	1.50e-9	0.00	0.00	10 - 41000
129	He⁺ + C₉ → C₈⁺ + C + He	1.50e-9	0.00	0.00	10 - 41000
130	He⁺ + C₉H₂ → C₇H⁺ + C₂H + He	1.00e-9	-0.50	0.00	10 - 41000
131	He⁺ + C₉H₂ → C₉⁺ + He + H₂	1.00e-9	-0.50	0.00	10 - 41000
132	He⁺ + C₉H₂ → C₉H⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
133	He⁺ + C₉H → C₇H⁺ + C₂ + He	2.50e-9	-0.50	0.00	10 - 41000
134	He⁺ + C₉H → C₉⁺ + He + H	2.50e-9	-0.50	0.00	10 - 41000
135	He⁺ + C₉N → C₈⁺ + CN + He	4.00e-9	-0.50	0.00	10 - 41000
136	He⁺ + CCP → CP + C⁺ + He	5.00e-10	-0.50	0.00	10 - 41000
137	He⁺ + CCP → P⁺ + C₂ + He	5.00e-10	-0.50	0.00	10 - 41000
138	He⁺ + CCl → Cl + C⁺ + He	3.30e-9	0.00	0.00	10 - 41000
139	He⁺ + CH₂ → C⁺ + He + H₂	7.50e-10	0.00	0.00	10 - 41000
140	He⁺ + CH₂ → CH⁺ + He + H	7.50e-10	0.00	0.00	10 - 41000
141	He⁺ + CH₂CCH → C₃⁺ + He + H₂ + H	6.70e-10	-0.50	0.00	10 - 41000
142	He⁺ + CH₂CCH → C₃H⁺ + He + H₂	6.70e-10	-0.50	0.00	10 - 41000
143	He⁺ + CH₂CCH → C₃H₂⁺ + He + H	6.70e-10	-0.50	0.00	10 - 41000
144	He⁺ + CH₂CHCN → C₂H₃⁺ + CN + He	5.25e-10	-0.50	0.00	10 - 41000
145	He⁺ + CH₂CHCN → CH₂CCH⁺ + N + He	5.25e-10	-0.50	0.00	10 - 41000
146	He⁺ + CH₂CHCN → HC₃N⁺ + He + H₂	3.15e-9	-0.50	0.00	10 - 41000
147	He⁺ + CH₂CHCN → HC₃NH⁺ + He + H	1.26e-9	-0.50	0.00	10 - 41000
148	He⁺ + CH₂CHCN → HCN + C₂H₂⁺ + He	3.50e-9	-0.50	0.00	10 - 41000
149	He⁺ + CH₂CN → CN + CH₂⁺ + He	3.30e-9	-0.50	0.00	10 - 41000
150	He⁺ + H₂CCO → CO⁺ + CH₂ + He	1.00e-9	-0.50	0.00	10 - 41000
151	He⁺ + H₂CCO → CO + CH₂⁺ + He	1.00e-9	-0.50	0.00	10 - 41000
152	He⁺ + CH₂NH → NH + CH₂⁺ + He	1.00e-9	-0.50	0.00	10 - 41000
153	He⁺ + CH₂PH → PH⁺ + CH₂ + He	5.00e-10	0.00	0.00	10 - 41000
154	He⁺ + CH₂PH → PH + CH₂⁺ + He	5.00e-10	0.00	0.00	10 - 41000
155	He⁺ + CH₃ → CH⁺ + He + H₂	1.80e-9	0.00	0.00	10 - 41000
156	He⁺ + CH₃C₃N → C₃N + CH₃⁺ + He	7.00e-8	0.00	0.00	10 - 41000
157	He⁺ + CH₃C₄H → C₅H₂⁺ + He + H₂	1.50e-9	0.00	0.00	10 - 41000
158	He⁺ + CH₃C₄H → C₅H₃⁺ + He + H	1.50e-9	0.00	0.00	10 - 41000
159	He⁺ + CH₃C₅N → C₅N + CH₃⁺ + He	7.00e-8	-0.50	0.00	10 - 41000
160	He⁺ + C₇H₄ → C₇H₂⁺ + He + H₂	1.50e-9	0.00	0.00	10 - 41000
161	He⁺ + C₇H₄ → C₇H₃⁺ + He + H	1.50e-9	0.00	0.00	10 - 41000
162	He⁺ + CH₃C₇N → C₇N + CH₃⁺ + He	7.00e-8	-0.50	0.00	10 - 41000
163	He⁺ + CH₃CCH → C₃⁺ + He + H₂ + H₂	5.00e-10	0.00	0.00	10 - 41000
164	He⁺ + CH₃CCH → C₃H⁺ + He + H₂ + H	5.00e-10	0.00	0.00	10 - 41000
165	He⁺ + CH₃CCH → C₃H₂⁺ + He + H₂	5.00e-10	0.00	0.00	10 - 41000
166	He⁺ + CH₃CCH → CH₂CCH⁺ + He + H	5.00e-10	0.00	0.00	10 - 41000
167	He⁺ + CH₃CH₃ → C₂H₂⁺ + He + H₂ + H₂	8.40e-10	0.00	0.00	10 - 41000
168	He⁺ + CH₃CH₃ → C₂H₃⁺ + He + H₂ + H	1.80e-9	0.00	0.00	10 - 41000
169	He⁺ + CH₃CH₃ → C₂H₄⁺ + He + H₂	4.20e-10	0.00	0.00	10 - 41000
170	He⁺ + CH₃CHO → HCO + CH₃⁺ + He	3.00e-9	-0.50	0.00	10 - 41000
171	He⁺ + CH₃CN → CN⁺ + CH₃ + He	1.20e-9	-0.50	0.00	10 - 41000
172	He⁺ + CH₃CN → CN + CH₃⁺ + He	1.20e-9	-0.50	0.00	10 - 41000
173	He⁺ + CH₃COCH₃ → CH₃CO⁺ + CH₃ + He	3.00e-9	-0.50	0.00	10 - 41000
174	He⁺ + CH₃OCH₃ → H₂CO + CH₃⁺ + He + H	2.00e-9	-0.50	0.00	10 - 41000
175	He⁺ + CH₃OH → OH⁺ + CH₃ + He	1.10e-9	-0.50	0.00	10 - 41000
176	He⁺ + CH₃OH → OH + CH₃⁺ + He	1.10e-9	-0.50	0.00	10 - 41000
177	He⁺ + CH₄ → CH⁺ + He + H₂ + H	2.40e-10	0.00	0.00	10 - 41000
178	He⁺ + CH₄ → CH₂⁺ + He + H₂	9.50e-10	0.00	0.00	10 - 41000
179	He⁺ + CH₄ → CH₃⁺ + He + H	8.50e-11	0.00	0.00	10 - 41000
180	He⁺ + CH₄ → CH₃ + He + H⁺	4.80e-10	0.00	0.00	10 - 41000
181	He⁺ + CH → C⁺ + He + H	1.10e-9	-0.50	0.00	10 - 41000
182	He⁺ + CN → N⁺ + C + He	8.80e-10	-0.50	0.00	10 - 41000
183	He⁺ + CN → N + C⁺ + He	8.80e-10	-0.50	0.00	10 - 41000
184	He⁺ + CNO → CN⁺ + O + He	1.99e-8	-0.50	0.00	10 - 300
185	He⁺ + CNO → O⁺ + CN + He	1.99e-8	-0.50	0.00	10 - 300
186	He⁺ + CO₂ → CO⁺ + O + He	8.70e-10	0.00	0.00	10 - 41000
187	He⁺ + CO₂ → CO + O⁺ + He	1.00e-10	0.00	0.00	10 - 41000
188	He⁺ + CO₂ → O₂⁺ + C + He	1.10e-11	0.00	0.00	10 - 41000
189	He⁺ + CO₂ → O₂ + C⁺ + He	4.00e-11	0.00	0.00	10 - 41000
190	He⁺ + CO → O + C⁺ + He	1.60e-9	0.00	0.00	10 - 41000
191	He⁺ + CP → P⁺ + C + He	5.00e-10	0.00	0.00	10 - 41000
192	He⁺ + CP → P + C⁺ + He	5.00e-10	0.00	0.00	10 - 41000
193	He⁺ + CS → S⁺ + C + He	1.30e-9	-0.50	0.00	10 - 41000
194	He⁺ + CS → S + C⁺ + He	1.30e-9	-0.50	0.00	10 - 41000
195	He⁺ + ClO → Cl⁺ + O + He	1.00e-9	-0.50	0.00	10 - 41000
196	He⁺ + H₂CCC → C₃⁺ + He + H₂	1.00e-9	-0.50	0.00	10 - 41000
197	He⁺ + H₂CCC → C₃H⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
198	He⁺ + H₂CO → CO⁺ + He + H₂	1.88e-9	-0.50	0.00	10 - 41000
199	He⁺ + H₂CO → HCO⁺ + He + H	1.14e-9	-0.50	0.00	10 - 41000
200	He⁺ + H₂CO → O + CH₂⁺ + He	1.71e-9	-0.50	0.00	10 - 41000
201	He⁺ + H₂CS → CS⁺ + He + H₂	8.10e-10	-0.50	0.00	10 - 41000
202	He⁺ + H₂CS → S⁺ + CH₂ + He	8.10e-10	-0.50	0.00	10 - 41000
203	He⁺ + H₂CS → S + CH₂⁺ + He	8.10e-10	-0.50	0.00	10 - 41000
204	He⁺ + H₂O → OH⁺ + He + H	2.86e-10	-0.50	0.00	10 - 41000
205	He⁺ + H₂O → OH + He + H⁺	2.04e-10	-0.50	0.00	10 - 41000
206	He⁺ + H₂S₂ → HS⁺ + HS + He	2.00e-9	-0.50	0.00	10 - 41000
207	He⁺ + H₂S₂ → HS₂⁺ + He + H	2.00e-9	-0.50	0.00	10 - 41000
208	He⁺ + H₂S → HS⁺ + He + H	4.84e-10	-0.50	0.00	10 - 41000
209	He⁺ + H₂S → S⁺ + He + H₂	3.61e-9	-0.50	0.00	10 - 41000
210	He⁺ + H₂SiO → SiOH⁺ + He + H	2.00e-9	-0.50	0.00	10 - 41000
211	He⁺ + HC₂P → CP⁺ + CH + He	5.00e-10	0.00	0.00	10 - 41000
212	He⁺ + HC₂P → CP + CH⁺ + He	5.00e-10	0.00	0.00	10 - 41000
213	He⁺ + HC₃N → C₂N⁺ + CH + He	2.84e-9	-0.50	0.00	10 - 41000
214	He⁺ + HC₃N → C₃H⁺ + N + He	4.00e-10	-0.50	0.00	10 - 41000
215	He⁺ + HC₃N → C₃N⁺ + He + H	2.45e-9	-0.50	0.00	10 - 41000
216	He⁺ + HC₃N → CN + C₂H⁺ + He	2.20e-9	-0.50	0.00	10 - 41000
217	He⁺ + HC₄H → C₂H⁺ + C₂H + He	1.00e-9	0.00	0.00	10 - 41000
218	He⁺ + HC₄H → C₄⁺ + He + H₂	1.00e-9	0.00	0.00	10 - 41000
219	He⁺ + HC₄H → C₄H⁺ + He + H	1.00e-9	0.00	0.00	10 - 41000
220	He⁺ + HC₅N → C₃N + C₂H⁺ + He	1.00e-9	-0.50	0.00	10 - 41000
221	He⁺ + HC₅N → C₄H⁺ + CN + He	1.00e-9	-0.50	0.00	10 - 41000
222	He⁺ + HC₇N → C₆H⁺ + CN + He	7.00e-9	-0.50	0.00	10 - 41000
223	He⁺ + HC₉N → C₈H⁺ + CN + He	7.00e-9	-0.50	0.00	10 - 41000
224	He⁺ + HCN → CN⁺ + He + H	1.46e-9	-0.50	0.00	10 - 41000
225	He⁺ + HCN → N⁺ + CH + He	2.17e-10	-0.50	0.00	10 - 41000
226	He⁺ + HCN → N + C⁺ + He + H	7.75e-10	-0.50	0.00	10 - 41000
227	He⁺ + HCN → N + CH⁺ + He	6.51e-10	-0.50	0.00	10 - 41000
228	He⁺ + HCO → CO⁺ + He + H	4.90e-10	-0.50	0.00	10 - 41000
229	He⁺ + HCO → O + CH⁺ + He	4.90e-10	-0.50	0.00	10 - 41000
230	He⁺ + HCOOCH₃ → HCO₂⁺ + CH₃ + He	3.00e-9	-0.50	0.00	10 - 41000
231	He⁺ + HCP → P⁺ + CH + He	5.00e-10	0.00	0.00	10 - 41000
232	He⁺ + HCP → PH + C⁺ + He	5.00e-10	0.00	0.00	10 - 41000
233	He⁺ + HCS → CS⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
234	He⁺ + HCS → CS + He + H⁺	1.00e-9	-0.50	0.00	10 - 41000
235	He⁺ + HCSi → Si⁺ + CH + He	1.00e-9	0.00	0.00	10 - 41000
236	He⁺ + HCSi → SiC⁺ + He + H	1.00e-9	0.00	0.00	10 - 41000
237	He⁺ + HCl → Cl⁺ + He + H	3.90e-9	-0.50	0.00	10 - 41000
238	He⁺ + HF → F⁺ + H + He	1.10e-8	-0.50	0.00	10 - 41000
239	He⁺ + HNC → CN⁺ + He + H	5.00e-10	-0.50	0.00	10 - 41000
240	He⁺ + HNC → N + C⁺ + He + H	5.00e-10	-0.50	0.00	10 - 41000
241	He⁺ + HNC → NH⁺ + C + He	5.00e-10	-0.50	0.00	10 - 41000
242	He⁺ + HNCO → OCN⁺ + H + He	5.68e-9	-0.50	0.00	10 - 300
243	He⁺ + HNO → NO⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
244	He⁺ + HNO → NO + He + H⁺	1.00e-9	-0.50	0.00	10 - 41000
245	He⁺ + HNSi → SiN⁺ + He + H	2.00e-9	0.00	0.00	10 - 41000
246	He⁺ + HOCN → OCN⁺ + H + He	4.47e-9	-0.50	0.00	10 - 300
247	He⁺ + HPO → PH⁺ + O + He	5.00e-10	-0.50	0.00	10 - 41000
248	He⁺ + HPO → PO⁺ + He + H	5.00e-10	-0.50	0.00	10 - 41000
249	He⁺ + HS₂ → HS + S⁺ + He	1.00e-9	-0.50	0.00	10 - 41000
250	He⁺ + HS₂ → S₂⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
251	He⁺ + HS → S⁺ + He + H	1.70e-9	0.00	0.00	10 - 41000
252	He⁺ + N₂ → N⁺ + N + He	9.60e-10	0.00	0.00	10 - 41000
253	He⁺ + N₂O → N₂⁺ + O + He	1.24e-9	0.00	0.00	10 - 41000
254	He⁺ + N₂O → N₂ + O⁺ + He	2.76e-10	0.00	0.00	10 - 41000
255	He⁺ + N₂O → NO⁺ + N + He	4.83e-10	0.00	0.00	10 - 41000
256	He⁺ + N₂O → NO + N⁺ + He	3.00e-10	0.00	0.00	10 - 41000
257	He⁺ + NCCN → CN⁺ + CN + He	2.70e-9	0.00	0.00	10 - 41000
258	He⁺ + NH₂ → N⁺ + He + H₂	8.00e-10	-0.50	0.00	10 - 41000
259	He⁺ + NH₂ → NH⁺ + He + H	8.00e-10	-0.50	0.00	10 - 41000
260	He⁺ + NH₂CN → NH₂⁺ + CN + He	1.00e-9	0.00	0.00	10 - 41000
261	He⁺ + NH₃ → NH⁺ + He + H₂	1.76e-10	-0.50	0.00	10 - 41000
262	He⁺ + NH₃ → NH₂⁺ + He + H	1.76e-9	-0.50	0.00	10 - 41000
263	He⁺ + NH → N⁺ + He + H	1.10e-9	-0.50	0.00	10 - 41000
264	He⁺ + NO → O⁺ + N + He	2.00e-10	0.00	0.00	10 - 41000
265	He⁺ + NO → O + N⁺ + He	1.40e-9	0.00	0.00	10 - 41000
266	He⁺ + NS → S⁺ + N + He	1.20e-9	-0.50	0.00	10 - 41000
267	He⁺ + NS → S + N⁺ + He	1.20e-9	-0.50	0.00	10 - 41000
268	He⁺ + O₂ → O⁺ + O + He	1.10e-9	0.00	0.00	10 - 41000
269	He⁺ + OCN → CN⁺ + O + He	3.00e-9	0.00	0.00	10 - 41000
270	He⁺ + OCN → CN + O⁺ + He	3.00e-9	0.00	0.00	10 - 41000
271	He⁺ + OCS → CS⁺ + O + He	7.60e-10	0.00	0.00	10 - 41000
272	He⁺ + OCS → CS + O⁺ + He	7.60e-10	0.00	0.00	10 - 41000
273	He⁺ + OCS → S⁺ + CO + He	7.60e-10	0.00	0.00	10 - 41000
274	He⁺ + OCS → S + CO⁺ + He	7.60e-10	0.00	0.00	10 - 41000
275	He⁺ + OH → O⁺ + He + H	1.10e-9	-0.50	0.00	10 - 41000
276	He⁺ + PH₂ → P⁺ + He + H₂	1.00e-9	0.00	0.00	10 - 41000
277	He⁺ + PH → P⁺ + He + H	1.00e-9	0.00	0.00	10 - 41000
278	He⁺ + PN → P⁺ + N + He	1.00e-9	-0.50	0.00	10 - 41000
279	He⁺ + PO → P⁺ + O + He	1.00e-9	-0.50	0.00	10 - 41000
280	He⁺ + S₂ → S⁺ + S + He	2.00e-9	0.00	0.00	10 - 41000
281	He⁺ + SO₂ → S⁺ + O₂ + He	9.00e-10	-0.50	0.00	10 - 41000
282	He⁺ + SO₂ → SO⁺ + O + He	2.97e-9	-0.50	0.00	10 - 41000
283	He⁺ + SO → S⁺ + O + He	8.30e-10	-0.50	0.00	10 - 41000
284	He⁺ + SO → S + O⁺ + He	8.30e-10	-0.50	0.00	10 - 41000
285	He⁺ + SiC₂ → Si⁺ + C₂ + He	2.00e-9	-0.50	0.00	10 - 41000
286	He⁺ + SiC₂H₂ → SiC₂H⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
287	He⁺ + SiC₂H₂ → SiH⁺ + C₂H + He	1.00e-9	-0.50	0.00	10 - 41000
288	He⁺ + SiC₂H → Si⁺ + C₂H + He	1.00e-9	-0.50	0.00	10 - 41000
289	He⁺ + SiC₂H → SiC₂⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
290	He⁺ + SiC₃ → SiC₂⁺ + C + He	2.00e-9	-0.50	0.00	10 - 41000
291	He⁺ + SiC₃H → C₃H + Si⁺ + He	1.00e-9	-0.50	0.00	10 - 41000
292	He⁺ + SiC₃H → SiC₃⁺ + He + H	1.00e-9	-0.50	0.00	10 - 41000
293	He⁺ + SiC₄ → SiC₃⁺ + C + He	2.00e-9	-0.50	0.00	10 - 41000
294	He⁺ + SiC → Si⁺ + C + He	2.00e-9	-0.50	0.00	10 - 41000
295	He⁺ + SiC → Si + C⁺ + He	2.00e-9	-0.50	0.00	10 - 41000
296	He⁺ + SiCH₂ → HCSi⁺ + He + H	1.00e-9	0.00	0.00	10 - 41000
297	He⁺ + SiCH₂ → SiH⁺ + CH + He	1.00e-9	0.00	0.00	10 - 41000
298	He⁺ + SiCH₃ → SiCH₂⁺ + He + H	1.00e-9	0.00	0.00	10 - 41000
299	He⁺ + SiCH₃ → SiH⁺ + CH₂ + He	1.00e-9	0.00	0.00	10 - 41000
300	He⁺ + SiH₂ → Si⁺ + He + H₂	1.00e-9	0.00	0.00	10 - 41000
301	He⁺ + SiH₂ → SiH⁺ + He + H	1.00e-9	0.00	0.00	10 - 41000
302	He⁺ + SiH₃ → SiH⁺ + He + H₂	1.00e-9	0.00	0.00	10 - 41000
303	He⁺ + SiH₃ → SiH₂⁺ + He + H	1.00e-9	0.00	0.00	10 - 41000
304	He⁺ + SiH₄ → Si⁺ + He + H₂ + H₂	1.41e-9	0.00	0.00	10 - 41000
305	He⁺ + SiH₄ → SiH⁺ + He + H₂ + H	9.40e-10	0.00	0.00	10 - 41000
306	He⁺ + SiH → Si⁺ + He + H	1.80e-9	0.00	0.00	10 - 41000
307	He⁺ + SiN → Si⁺ + N + He	2.00e-9	-0.50	0.00	10 - 41000
308	He⁺ + SiNC → Si + CN⁺ + He	2.00e-9	-0.50	0.00	10 - 41000
309	He⁺ + SiO₂ → O₂ + Si⁺ + He	2.00e-9	0.00	0.00	10 - 41000
310	He⁺ + SiO → Si⁺ + O + He	8.60e-10	-0.50	0.00	10 - 41000
311	He⁺ + SiO → Si + O⁺ + He	8.60e-10	-0.50	0.00	10 - 41000
312	He⁺ + SiS → S⁺ + Si + He	3.80e-9	-0.50	0.00	10 - 41000
313	He⁺ + SiS → S + Si⁺ + He	3.80e-9	-0.50	0.00	10 - 41000
314	He⁺ + C^- → C + He	7.51e-8	-0.50	0.00	10 - 41000
315	C₁₀^- + He⁺ → C₁₀ + He	7.51e-8	-0.50	0.00	10 - 41000
316	C₁₀H^- + He⁺ → C₁₀H + He	7.51e-8	-0.50	0.00	10 - 41000
317	C₂^- + He⁺ → C₂ + He	7.51e-8	-0.50	0.00	10 - 41000
318	C₂H^- + He⁺ → C₂H + He	7.51e-8	-0.50	0.00	10 - 41000
319	C₃^- + He⁺ → C₃ + He	7.51e-8	-0.50	0.00	10 - 41000
320	C₃H^- + He⁺ → C₃H + He	7.51e-8	-0.50	0.00	10 - 41000
321	C₃N^- + He⁺ → C₃N + He	7.51e-8	-0.50	0.00	10 - 41000
322	C₄^- + He⁺ → C₄ + He	7.51e-8	-0.50	0.00	10 - 41000
323	C₄H^- + He⁺ → C₄H + He	7.51e-8	-0.50	0.00	10 - 41000
324	C₅^- + He⁺ → C₅ + He	7.51e-8	-0.50	0.00	10 - 41000
325	C₅H^- + He⁺ → C₅H + He	7.51e-8	-0.50	0.00	10 - 41000
326	C₅N^- + He⁺ → C₅N + He	7.51e-8	-0.50	0.00	10 - 41000
327	C₆^- + He⁺ → C₆ + He	7.51e-8	-0.50	0.00	10 - 41000
328	C₆H^- + He⁺ → C₆H + He	7.51e-8	-0.50	0.00	10 - 41000
329	C₇^- + He⁺ → C₇ + He	7.51e-8	-0.50	0.00	10 - 41000
330	C₇H^- + He⁺ → C₇H + He	7.51e-8	-0.50	0.00	10 - 41000
331	C₈^- + He⁺ → C₈ + He	7.51e-8	-0.50	0.00	10 - 41000
332	C₈H^- + He⁺ → C₈H + He	7.51e-8	-0.50	0.00	10 - 41000
333	C₉^- + He⁺ → C₉ + He	7.51e-8	-0.50	0.00	10 - 41000
334	C₉H^- + He⁺ → C₉H + He	7.51e-8	-0.50	0.00	10 - 41000
335	CH^- + He⁺ → CH + He	7.51e-8	-0.50	0.00	10 - 41000
336	CN^- + He⁺ → CN + He	7.51e-8	-0.50	0.00	10 - 41000
337	H^- + He⁺ → He + H	7.51e-8	-0.50	0.00	10 - 41000
338	O^- + He⁺ → O + He	7.51e-8	-0.50	0.00	10 - 41000
339	O₂^- + He⁺ → O₂ + He	7.51e-8	-0.50	0.00	10 - 41000
340	OH^- + He⁺ → OH + He	7.51e-8	-0.50	0.00	10 - 41000
341	He⁺ + S^- → S + He	7.51e-8	-0.50	0.00	10 - 41000
342	He⁺ + e^- → He + PHOTON	5.36e-12	-0.50	0.00	10 - 1000

	Reaction	α	β	γ	T_l - T_u (K)
1	He + CRP → He⁺ + e^-	6.50e-18	0.00	0.00	10 - 41000
2	He + CRPHOT → He⁺ + e^-	1.30e-17	0.00	0.20	10 - 41000
3	H₂⁺ + He → HeH⁺ + H	1.30e-10	0.00	0.00	10 - 41000
4	H⁺ + He → HeH⁺ + PHOTON	5.26e-20	-0.51	0.00	16 - 100

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