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.. common
H2
H
CO
OH
HCO+
C
H3+
C+
H2O
e-

.. in RATE12
C
C+
C-
C10
C10+
C10-
C10H
C10H+
C10H-
C10H2
C10H2+
C10H3+
C11
C11+
C2
C2+
C2-
C2H
C2H+
C2H-
C2H2
C2H2+
C2H3
C2H3+
C2H4
C2H4+
C2H5
C2H5+
C2H5CN
C2H5CNH+
C2H5OH
C2H5OH+
C2H5OH2+
C2H7+
C2N
C2N+
C2N2+
C2NH+
C2O
C2O+
C2S
C2S+
C3
C3+
C3-
C3H
C3H+
C3H-
C3H2
C3H2+
C3H2O+
C3H3+
C3H4+
C3H5+
C3H6+
C3H7+
C3N
C3N+
C3N-
C3O
C3O+
C3P
C3S
C3S+
C4
C4+
C4-
C4H
C4H+
C4H-
C4H2+
C4H3
C4H3+
C4H4+
C4H5+
C4H7+
C4N
C4N+
C4P
C4P+
C4S
C4S+
C5
C5+
C5-
C5H
C5H+
C5H-
C5H2
C5H2+
C5H3+
C5H5+
C5N
C5N+
C5N-
C6
C6+
C6-
C6H
C6H+
C6H-
C6H2
C6H2+
C6H3+
C6H4+
C6H5+
C6H6
C6H6+
C6H7+
C7
C7+
C7-
C7H
C7H+
C7H-
C7H2
C7H2+
C7H3+
C7H4+
C7H5+
C7N
C7N+
C8
C8+
C8-
C8H
C8H+
C8H-
C8H2
C8H2+
C8H3+
C8H4+
C8H5+
C9
C9+
C9-
C9H
C9H+
C9H-
C9H2
C9H2+
C9H3+
C9H4+
C9H5+
C9N
C9N+
CCP
CCP+
CCl
CCl+
CF+
CH
CH+
CH-
CH2
CH2+
CH2CCH
CH2CCH+
CH2CCH2
CH2CHCCH
CH2CHCHCH2
CH2CHCN
CH2CHCN+
CH2CHCNH+
CH2CN
CH2CN+
CH2CO
CH2CO+
CH2NH
CH2NH2+
CH2PH
CH3
CH3+
CH3C3N
CH3C3N+
CH3C3NH+
CH3C4H
CH3C4H+
CH3C5N
CH3C5NH+
CH3C6H
CH3C7N
CH3C7NH+
CH3CCH
CH3CH3
CH3CH3+
CH3CHCH2
CH3CHO
CH3CHO+
CH3CHOH+
CH3CN
CH3CN+
CH3CNH+
CH3CO+
CH3COCH3
CH3COCH3+
CH3COCH4+
CH3CS+
CH3OCH3
CH3OCH3+
CH3OCH4+
CH3OH
CH3OH+
CH3OH2+
CH4
CH4+
CH4N+
CH5+
CN
CN+
CN-
CNC+
CNO
CO
CO+
CO2
CO2+
COOCH4+
CP
CP+
CRP
CRPHOT
CS
CS+
Cl
Cl+
ClO
ClO+
F
F+
Fe
Fe+
H
H+
H-
H2
H2+
H2C4N+
H2C7N+
H2C9N+
H2CCC
H2CCl+
H2CN
H2CNO+
H2CO
H2CO+
H2CS
H2CS+
H2Cl+
H2F+
H2NC+
H2NCO+
H2NO+
H2O
H2O+
H2O2
H2OCN+
H2PO+
H2S
H2S+
H2S2
H2S2+
H2SiO
H2SiO+
H3+
H3C3O+
H3C5N+
H3C7N+
H3C9N+
H3CO+
H3CS+
H3O+
H3S+
H3S2+
H3SiO+
H5C2O2+
HC2O+
HC2P
HC2P+
HC2S+
HC3N
HC3N+
HC3NH+
HC3O+
HC3S+
HC4H
HC4N+
HC4S+
HC5N
HC5N+
HC5NH+
HC7N
HC7N+
HC9N
HC9N+
HCN
HCN+
HCNH+
HCNO
HCNO+
HCNOH+
HCO
HCO+
HCO2+
HCOOCH3
HCOOH
HCOOH+
HCOOH2+
HCP
HCP+
HCS
HCS+
HCSi
HCSi+
HCl
HCl+
HF
HF+
HN2O+
HNC
HNC3
HNCO
HNCO+
HNCOH+
HNO
HNO+
HNS+
HNSi
HNSi+
HOC+
HOCN
HOCN+
HOCS+
HONC
HONC+
HPN+
HPO
HPO+
HS
HS+
HS2
HS2+
HSO+
HSO2+
HSiO2+
HSiS+
He
He+
HeH+
Mg
Mg+
N
N+
N2
N2+
N2H+
N2O
N2O+
NCCN
NCCNCH3+
NCCNH+
NH
NH+
NH2
NH2+
NH2CN
NH2CNH+
NH3
NH3+
NH4+
NO
NO+
NO2
NO2+
NS
NS+
Na
Na+
O
O+
O-
O2
O2+
O2-
O2H
O2H+
OCN
OCN+
OCS
OCS+
OH
OH+
OH-
P
P+
PC2H2+
PC2H3+
PC2H4+
PC3H+
PC4H+
PCH2+
PCH3+
PCH4+
PH
PH+
PH2
PH2+
PH3+
PHOTON
PN
PN+
PNH2+
PNH3+
PO
PO+
S
S+
S-
S2
S2+
SO
SO+
SO2
SO2+
Si
Si+
SiC
SiC+
SiC2
SiC2+
SiC2H
SiC2H+
SiC2H2
SiC2H2+
SiC2H3+
SiC3
SiC3+
SiC3H
SiC3H+
SiC3H2+
SiC4
SiC4+
SiC4H+
SiCH2
SiCH2+
SiCH3
SiCH3+
SiCH4+
SiF+
SiH
SiH+
SiH2
SiH2+
SiH3
SiH3+
SiH4
SiH4+
SiH5+
SiN
SiN+
SiNC
SiNC+
SiNCH+
SiNH2+
SiO
SiO+
SiO2
SiOH+
SiS
SiS+
e-

C2H

Ethynyl radical
Flags: Detected, RATE12
Empirical: C2H
Mass: 25 amu
Dipole moment: 0.800 D
Heat of formation: 560.0 kJ mol-1
Added to system: 2003-04-28 18:00:51

Reactions: Formation | Destruction

109 C2H formation reactions

ReactionαβγTl - Tu (K)
1C- + CH → C2H + e-5.00e-10 0.00 0.0010 - 41000
2C + CH- → C2H + e-1.00e-9 0.00 0.0010 - 300
3H- + C2 → C2H + e-1.00e-9 0.00 0.0010 - 41000
4H + C2- → C2H + e-7.70e-9 0.00 0.0010 - 300
5C2H+ + NO → NO+ + C2H1.20e-10 0.00 0.0010 - 41000
6C2H+ + S → S+ + C2H1.20e-9 0.00 0.0010 - 41000
7C2H- + CRPHOT → C2H + e-1.30e-17 0.00250.0010 - 41000
8C2H2 + CRPHOT → C2H + H1.30e-17 0.002577.5010 - 41000
9C4H + CRPHOT → C2H + C21.30e-17 0.002500.0010 - 41000
10C5H2 + CRPHOT → C3H + C2H1.30e-17 0.00875.0010 - 41000
11C5H + CRPHOT → C3 + C2H1.30e-17 0.002500.0010 - 41000
12C6H2 + CRPHOT → C4H + C2H1.30e-17 0.00875.0010 - 41000
13C6H + CRPHOT → C4 + C2H1.30e-17 0.002500.0010 - 41000
14HC3N + CRPHOT → CN + C2H1.30e-17 0.00863.5010 - 41000
15HC4H + CRPHOT → C2H + C2H1.30e-17 0.00865.0010 - 41000
16HC4H + CRPHOT → C2H + C2H1.30e-17 0.00865.0010 - 41000
17HNC3 + CRPHOT → C2H + CN1.30e-17 0.001725.0010 - 41000
18C2H2+ + e- → C2H + H9.00e-8-0.50 0.0010 - 300
19C2H3+ + e- → C2H + H23.00e-8-0.84 0.0050 - 1000
20C2H3+ + e- → C2H + H25.75e-8-1.38 0.001000 - 30000
21C2H3+ + e- → C2H + H + H2.95e-7-0.84 0.0050 - 1000
22C2H3+ + e- → C2H + H + H5.65e-7-1.38 0.001000 - 30000
23C2H4+ + e- → C2H + H2 + H5.60e-8-0.76 0.0010 - 300
24C3H+ + e- → C2H + C1.50e-7-0.50 0.0010 - 300
25C3H4+ + e- → CH3 + C2H2.60e-7-0.67 0.0010 - 300
26C4H2+ + e- → C2H + C2H2.75e-7-0.79 0.0010 - 1000
27C4H2+ + e- → C2H + C2H2.75e-7-0.79 0.0010 - 1000
28HC2O+ + e- → C2H + O1.50e-7-0.50 0.0010 - 300
29HC3N+ + e- → CN + C2H3.60e-7-0.60 0.0010 - 300
30HC4S+ + e- → C2S + C2H1.00e-7-0.50 0.0010 - 300
31HC5N+ + e- → C3N + C2H1.50e-7-0.50 0.0010 - 300
32HC5NH+ + e- → HC3N + C2H1.20e-7-0.70 0.0010 - 1000
33PC4H+ + e- → CCP + C2H7.50e-8-0.50 0.0010 - 300
34SiC2H+ + e- → Si + C2H1.50e-7-0.50 0.0010 - 300
35C+ + C4H3 → C3H2+ + C2H3.10e-10 0.00 0.0010 - 300
36C+ + CH3CCH → C2H3+ + C2H1.90e-10 0.00 0.0010 - 41000
37C+ + HC2P → CP+ + C2H5.00e-10 0.00 0.0010 - 41000
38C+ + HC3N → C2N+ + C2H1.00e-10-0.50 0.0010 - 41000
39C+ + HC4H → C3H+ + C2H1.45e-10 0.00 0.0010 - 41000
40C2H2+ + CH3CN → CH3CNH+ + C2H8.36e-10-0.50 0.0010 - 41000
41C2H2+ + H2S → H3S+ + C2H4.60e-11-0.50 0.0010 - 41000
42C2H2+ + HCN → HCNH+ + C2H2.30e-10-0.50 0.0010 - 41000
43C2H2+ + HNC → HCNH+ + C2H2.30e-10-0.50 0.0010 - 41000
44C2H3+ + C2H3 → C2H5+ + C2H5.00e-10-0.50 0.0010 - 41000
45C3H+ + HC4H → C5H2+ + C2H1.00e-9 0.00 0.0010 - 41000
46H2O + C2H2+ → C2H + H3O+2.20e-10-0.50 0.0010 - 41000
47HC4H + C5H2+ → C7H3+ + C2H6.00e-10 0.00 0.0010 - 41000
48HNC3 + H+ → HCN+ + C2H3.23e-9-0.50 0.0010 - 41000
49He+ + C5H2 → C3H+ + C2H + He1.00e-9-0.50 0.0010 - 41000
50He+ + C6H2 → C4H+ + C2H + He1.00e-9-0.50 0.0010 - 41000
51He+ + C7H2 → C5H+ + C2H + He1.00e-9-0.50 0.0010 - 41000
52He+ + C8H2 → C6H+ + C2H + He1.00e-9-0.50 0.0010 - 41000
53He+ + C9H2 → C7H+ + C2H + He1.00e-9-0.50 0.0010 - 41000
54He+ + HC4H → C2H+ + C2H + He1.00e-9 0.00 0.0010 - 41000
55He+ + SiC2H2 → SiH+ + C2H + He1.00e-9-0.50 0.0010 - 41000
56He+ + SiC2H → Si+ + C2H + He1.00e-9-0.50 0.0010 - 41000
57N + C3H- → CN- + C2H2.50e-12 0.00 0.0010 - 300
58NH2 + C2H2+ → C2H + NH3+4.50e-10-0.50 0.0010 - 41000
59NH3 + C2H2+ → C2H + NH4+9.61e-10-0.50 0.0010 - 41000
60O + C3H2+ → HCO+ + C2H2.00e-10 0.00 0.0010 - 41000
61C2H- + C+ → C + C2H7.51e-8-0.50 0.0010 - 41000
62C2H- + C2H2+ → C2H + C2H27.51e-8-0.50 0.0010 - 41000
63C2H- + C2H3+ → C2H + C2H37.51e-8-0.50 0.0010 - 41000
64C2H- + C4H2+ → C2H + HC4H7.51e-8-0.50 0.0010 - 41000
65C2H- + C4H3+ → C2H + C4H37.51e-8-0.50 0.0010 - 41000
66C2H- + C4S+ → C2H + C4S7.51e-8-0.50 0.0010 - 41000
67C2H- + CH2CCH+ → C2H + CH2CCH7.51e-8-0.50 0.0010 - 41000
68C2H- + CH3+ → C2H + CH37.51e-8-0.50 0.0010 - 41000
69C2H- + CNC+ → C2H + C2N7.51e-8-0.50 0.0010 - 41000
70C2H- + Fe+ → C2H + Fe7.51e-8-0.50 0.0010 - 41000
71C2H- + H+ → C2H + H7.51e-8-0.50 0.0010 - 41000
72C2H- + H2CO+ → C2H + H2CO7.51e-8-0.50 0.0010 - 41000
73C2H- + H2S+ → C2H + H2S7.51e-8-0.50 0.0010 - 41000
74C2H- + H3+ → C2H + H2 + H7.51e-8-0.50 0.0010 - 41000
75C2H- + H3O+ → C2H + H + H2O7.51e-8-0.50 0.0010 - 41000
76C2H- + HC2S+ → C2H + C2S + H7.51e-8-0.50 0.0010 - 41000
77C2H- + HCNH+ → C2H + HCN + H3.76e-8-0.50 0.0010 - 41000
78C2H- + HCNH+ → C2H + HNC + H3.76e-8-0.50 0.0010 - 41000
79C2H- + HCO+ → C2H + H + CO3.76e-8-0.50 0.0010 - 41000
80C2H- + HCO+ → C2H + HCO3.76e-8-0.50 0.0010 - 41000
81C2H- + He+ → C2H + He7.51e-8-0.50 0.0010 - 41000
82C2H- + Mg+ → C2H + Mg7.51e-8-0.50 0.0010 - 41000
83C2H- + N+ → C2H + N7.51e-8-0.50 0.0010 - 41000
84C2H- + N2H+ → C2H + N2 + H7.51e-8-0.50 0.0010 - 41000
85C2H- + NH3+ → C2H + NH37.51e-8-0.50 0.0010 - 41000
86C2H- + NH4+ → C2H + NH3 + H7.51e-8-0.50 0.0010 - 41000
87C2H- + NO+ → C2H + NO7.51e-8-0.50 0.0010 - 41000
88C2H- + Na+ → C2H + Na7.51e-8-0.50 0.0010 - 41000
89C2H- + O+ → C2H + O7.51e-8-0.50 0.0010 - 41000
90C2H- + S+ → C2H + S7.51e-8-0.50 0.0010 - 41000
91C2H- + SO+ → C2H + SO7.51e-8-0.50 0.0010 - 41000
92C2H- + Si+ → C2H + Si7.51e-8-0.50 0.0010 - 41000
93C2H- + SiO+ → C2H + SiO7.51e-8-0.50 0.0010 - 41000
94C2H- + SiOH+ → C2H + SiO + H7.51e-8-0.50 0.0010 - 41000
95C2H- + SiS+ → C2H + SiS7.51e-8-0.50 0.0010 - 41000
96C + CH2 → C2H + H1.00e-10 0.00 0.0010 - 300
97H + C2H2 → C2H + H23.80e-10 0.0013634.00295 - 6920
98HCNO + C → C2H + NO3.33e-11 0.00 0.0010 - 300
99O + C3H → CO + C2H1.00e-10 0.00 0.0010 - 2500
100OH + C2H2 → C2H + H2O1.05e-13 2.686060.00300 - 2500
101C2H- + PHOTON → C2H + e-2.99e-9 0.00 2.0010 - 41000
102C2H2 + PHOTON → C2H + H3.30e-9 0.00 2.3010 - 41000
103C4H + PHOTON → C2H + C21.85e-9 0.00 2.0010 - 41000
104C5H2 + PHOTON → C3H + C2H1.00e-11 0.00 1.7010 - 41000
105C5H + PHOTON → C3 + C2H4.33e-10 0.00 1.4010 - 41000
106C6H + PHOTON → C4 + C2H5.00e-12 0.00 1.7010 - 41000
107HC3N + PHOTON → CN + C2H5.60e-9 0.00 2.2010 - 41000
108HC4H + PHOTON → C2H + C2H1.90e-9 0.00 1.6010 - 41000
109HC4H + PHOTON → C2H + C2H1.90e-9 0.00 1.6010 - 41000

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