CH₃C₄H

Methyldiacetylene
Flags: Detected, RATE12
Empirical: C₅H₄
Mass: 64 amu
Dipole moment: 1.210 D
Heat of formation: 425.0 kJ mol^-1
Added to system: 2003-04-28 18:00:51

Reactions: Formation | Destruction

6 CH₃C₄H formation reactions

	Reaction	α	β	T_l - T_u (K)
1	C₅H₅⁺ + e^- → CH₃C₄H + H	3.00e-7	-0.50	10 - 300
2	C₂ + CH₃CHCH₂ → CH₃C₄H + H + H	4.10e-10	0.00	77 - 296
3	C₂H + CH₂CCH₂ → CH₃C₄H + H	3.09e-10	0.00	10 - 100
4	C₂H + CH₂CCH₂ → CH₃C₄H + H	2.00e-10	-0.40	101 - 300
5	C₂H + CH₃CCH → CH₃C₄H + H	2.92e-10	0.00	10 - 100
6	C₂H + CH₃CCH → CH₃C₄H + H	2.10e-10	-0.30	101 - 300

	Reaction	α	γ	T_l - T_u (K)
1	H⁺ + CH₃C₄H → CH₃C₄H⁺ + H	2.00e-9	0.00	10 - 300
2	CH₃C₄H + CRPHOT → C₄H + CH₃	1.30e-17	750.00	10 - 41000
3	C⁺ + CH₃C₄H → C₅H₃⁺ + CH	7.50e-10	0.00	10 - 41000
4	C⁺ + CH₃C₄H → C₆H₂⁺ + H₂	7.50e-10	0.00	10 - 41000
5	C⁺ + CH₃C₄H → C₆H₃⁺ + H	2.00e-9	0.00	10 - 41000
6	H⁺ + CH₃C₄H → C₅H₃⁺ + H₂	2.00e-9	0.00	10 - 41000
7	H₃⁺ + CH₃C₄H → C₅H₅⁺ + H₂	2.50e-9	0.00	10 - 41000
8	HCO⁺ + CH₃C₄H → C₅H₅⁺ + CO	2.00e-9	0.00	10 - 41000
9	He⁺ + CH₃C₄H → C₅H₂⁺ + He + H₂	1.50e-9	0.00	10 - 41000
10	He⁺ + CH₃C₄H → C₅H₃⁺ + He + H	1.50e-9	0.00	10 - 41000
11	C + CH₃C₄H → C₆H₂ + H₂	6.50e-10	0.00	10 - 300
12	CH₃C₄H + PHOTON → C₄H + CH₃	2.00e-11	1.70	10 - 41000

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

CH3C4H

CH₃C₄H