CH₂CO

H2CCO, Ketene
Flags: Detected, RATE12
Empirical: C₂H₂O
Mass: 42 amu
Dipole moment: 1.420 D
Heat of formation: -44.6 kJ mol^-1
Added to system: 2003-04-28 18:00:51

Reactions: Formation | Destruction

10 CH₂CO formation reactions

	Reaction	α	β	γ	T_l - T_u (K)
1	CH₃COCH₃ + CRPHOT → H₂CCO + CH₄	1.30e-17	0.00	750.00	10 - 41000
2	CH₃CHO⁺ + e^- → H₂CCO + H + H	4.20e-7	-0.70	0.00	10 - 1000
3	CH₃CO⁺ + e^- → H₂CCO + H	3.00e-7	-0.50	0.00	10 - 300
4	O₂⁺ + CH₃CHCH₂ → H₃CO⁺ + CH₂CO + H	3.00e-11	0.00	0.00	10 - 41000
5	SO⁺ + CH₂CCH₂ → H₂CS⁺ + CH₂CO	7.20e-11	0.00	0.00	10 - 41000
6	SO⁺ + CH₂CCH₂ → HCS⁺ + CH₂CO + H	1.80e-10	0.00	0.00	10 - 41000
7	O + C₂H₃ → H₂CCO + H	1.60e-10	0.00	0.00	10 - 2500
8	O + C₂H₄ → H₂CCO + H₂	5.11e-14	1.88	92.00	300 - 2000
9	O + CH₂CCH₂ → CH₂ + CH₂CO	1.27e-11	-0.09	798.70	200 - 1000
10	OH + C₂H₂ → H₂CCO + H	1.84e-11	0.00	5027.00	500 - 2500

	Reaction	α	β	γ	T_l - T_u (K)
1	C⁺ + H₂CCO → CH₂CO⁺ + C	2.00e-9	-0.50	0.00	10 - 41000
2	H₂CCO + CRPHOT → CH₂CO⁺ + e^-	1.30e-17	0.00	609.00	10 - 41000
3	H₂CCO + CRPHOT → CO + CH₂	1.30e-17	0.00	456.50	10 - 41000
4	H₃⁺ + H₂CCO → CH₃CO⁺ + H₂	2.00e-9	-0.50	0.00	10 - 41000
5	H₃O⁺ + H₂CCO → CH₃CO⁺ + H₂O	2.00e-9	-0.50	0.00	10 - 41000
6	HCO⁺ + H₂CCO → CH₃CO⁺ + CO	1.80e-9	-0.50	0.00	10 - 41000
7	He⁺ + H₂CCO → CO⁺ + CH₂ + He	1.00e-9	-0.50	0.00	10 - 41000
8	He⁺ + H₂CCO → CO + CH₂⁺ + He	1.00e-9	-0.50	0.00	10 - 41000
9	H + H₂CCO → CH₃ + CO	5.68e-11	0.00	1897.00	200 - 2000
10	H₂CCO + PHOTON → CH₂CO⁺ + e^-	6.60e-10	0.00	2.80	10 - 41000
11	H₂CCO + PHOTON → CO + CH₂	1.40e-9	0.00	2.70	10 - 41000

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

CH2CO

CH₂CO