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Table 4.

Deuteration fractions in TMC-1 compared to our gas phase chemical model.

Molecules TMC-1 Model A (a) Model An (b) Model B (a) Model Bn (b)
CH3C4H/CH2DC4H 24 (b) 59 31 20 16
CH3C4H/CH3C4D ≥144 (c) 134 78 55 44
CH3C3N/CH2DC3N 22 (a) 76 29 31 22
CH3CN/CH2DCN 11 (d) 15 15 15 15
H2CCN/HDCCN 20 (d) 24 24 24 24
HC3N/DC3N 62 (e) 55 50 55 52
HNCCC/DNCCC 43 (e) 35 34 35 34
HCCNC/DCCNC 30 (e) 27 27 27 27
HC5N/DC5Nb 82 (e) 23 20 23 20
c-C3H2/c-C3HD 27 (d) 46 36 45 36
C4H/C4D 118 (d) 55 46 55 46
H2C4/HDC4 83 (d) 50 33 49 33
CH3CCH/CH3CCD 49 (d) 257 46 264 48
CH3CCH/CH2DCCH 10 (d) 76 15 76 15
(b)

This work.

(c)

3σ upper limit.

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