Table 1
Positions and attributions of infrared absorption bands after a 240 min photolysis at 20 K of a pure ethylamine (C2H5NH2) ice and of its pure isotopomer (C2H515NH2).
| Ice | Wavenumber | Attribution | Identification | Ref. |
| (λ > 120 nm) | (cm-1) | |||
|
|
||||
| C2H5NH2 | 3380 | NH3 | (ν3) (νas) NH3 | (d’Hendecourt et al. 1986; Ferraro et al. 1980) |
| (pure, 20 K) | 3294 | NH3 | (2 ν4) harmonic | (d’Hendecourt et al. 1986; Ferraro et al. 1980) |
| 3209 | NH3 | (ν1) (νs) NH3 | (d’Hendecourt et al. 1986; Ferraro et al. 1980) | |
| 3127 | C2H5 | νas CH2 | (Sogoshi et al. 1997) | |
| 3008 | CH4 | νCH4 | (d’Hendecourt et al. 1986; Gerakines et al. 1996) | |
| 2655 | [CH3CH2 ] |
Fermi res. | (Hagemann & Bill 1984) | |
| 2566 | [CH3CH2] |
Fermi res. | (Hagemann & Bill 1984) | |
| 2250 | CH3C ≡ N | ν C ≡ N | (d’Hendecourt et al. 1986; Hudson & Moore 2004) | |
| 2165 | CH3–NC? | ν NC? | (Hudson & Moore 2004) | |
| 2080 | [CN] | ν C-N | (Gerakines et al. 2004; Moore & Hudson 2003) | |
| 2058 | CH2=C=NH | νas C=C=N | (Hudson & Moore 2004; Jacox & Milligan 1963) | |
| 1670 | [CH3CH2] |
δ
as
|
(Hagemann & Bill 1984; Zeroka et al. 1999) | |
| 1652 | CH3CH=NH | ν C=N | (Hashiguchi et al. 1984; Stolkini et al. 1977) | |
| 1433 | CH3CH=NH | δas CH3 | (Stolkini et al. 1977) | |
| 1412 | CH3CH=NH | δs CH3 | (Stolkini et al. 1977) | |
| 1357 | CH3CH=NH | mixed mode | (Hashiguchi et al. 1984; Stolkini et al. 1977) | |
| 1301 | CH4 | dd CH4 | (d’Hendecourt et al. 1986; Gerakines et al. 1996) | |
| 1062 | NH3 | (ν2) umbrella mode | (d’Hendecourt et al. 1986; Ferraro et al. 1980) | |
| 996 | CH2=C=NH | δ CNH | (Jacox & Milligan 1963) | |
|
|
||||
| C2H515NH2 | 3202 | 15NH3 | (ν1) (νs) 15NH3 | |
| (pure, 20K) | 2224 | CH3C ≡ 15N | ν C ≡ 15N | |
| 2136 | CH3–15NC? | ν15NC | ||
| 2071 | [C15N] | ν C–15N | (Gerakines et al. 2004; Moore & Hudson 2003) | |
| 2031 | CH2=C=15NH | ν C=15N | ||
| 1634 | CH3CH=15NH | ν C=15N | ||
| 1433 | CH3CH=15NH | δas CH3 | (Stolkini et al. 1977) | |
| 1412 | CH3CH=15NH | δs CH3 | (Stolkini et al. 1977) | |
Notes. Vibration mode: stretching (ν), bending (δ), rocking (ρ), torsion (τ), wagging (w). Type of vibration mode: asymmetric (as), symmetric (s).
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