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Table 3

Assigned features of the infrared spectrum of the EXP1 ice mixture (H2O:CH3OH:NH3 = 10:1:1) after 56 h of VUV photolysis at 25 K and warmed at 260 K.

EXP1 260 K
Wavenumber (cm-1) Assignments Species References

1580 ν(COO) HCOO Vinogradoff et al. (2012b)
1464 δ(CNH) TMTH+ Vinogradoff et al. (2012b)
1376 ρs(CH) HCOO Vinogradoff et al. (2012b)
1341 νs(C=O)/ρas(CH) HCOO Vinogradoff et al. (2012b)
1215 ν(C-N) unknown
1068 ν(C-N) unknown
964 ? unknown
766 ρs(NH2)/ δ(OCO) HCOO/TMTH+ Vinogradoff et al. (2012b)

Notes.Vibration mode: stretching (ν), bending (δ), rocking (ρ), as: asymmetric mode, s: symmetric mode.

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