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Table 2

Molecular detections in Sz28.

Molecule Emission band Wavelength (μm)
CH3 Out-of-plane bending mode (ν2) 16.48
CH4 Degenerate deformation mode (ν4) 7.65
C2H2 Asymmetric bending mode (ν5) 13.71
13CCH2 Asymmetric bending mode (ν5) 13.73
C2H6 CH3 Rocking mode (ν9) 12.17
C3H4 (a) CH bending mode (ν9) 15.80
C4H2 CH bending mode (ν8) 15.92
C6H6 Out-of-plane bending mode (ν4) 14.85
CO2 Fundamental bending mode (ν2) 14.98
Excited bending mode (ν1 ν2 ν3: 100–010) 13.88, 16.18
13CO2 Fundamental bending mode (ν2) 15.41
Excited bending mode (ν1 ν2 ν3: 100–010) 16.20
HCN Fundamental bending mode (ν2:1–0) 14.00
Excited bending mode (ν2:2–1) 14.30
HC3N HCC bending mode (ν5) 15.08

Notes. (a)Propyne, CH3CCH.

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