Detection of six isotopologues of CH3CCCCH in TMC-1 with the QUIJOTE line survey

Open Access

Table 3.

Branching ratios for the deuterated version of the C₂H + C₃H₄ reactions, including propyne CH₃CCH and 1, 2-propadiene CH₂ = C = CH₂.

Reaction	Model A ^(a)	Model B ^(b)
C₂D + CH₃CCH → CH₃C₄D + H	1	0.12
C₂D + CH₃CCH → CH₂DC₃H + H	0	0.38
C₂D + CH₃CCH → CH₃C₄H + D	0	0.5

Notes.

^(a)

Model A: direct process.

^(b)

Model B: statistical distribution following the temporary formation of an activated complex.

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