Open Access
Table B.5
Peak position and FWHM of methyl cyanide CH3 symmetric deformation mode (1374.5 cm−1/ 7.275 µm) in pure and mixed ices at temperatures ranging from 15 - 150 K.
| T | Matrix | 1:5 | 1:10 | 1:20 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Peak | FWHM | Peak | FWHM | Peak | FWHM | Peak | FWHM | Peak | FWHM | Peak | FWHM | ||
| (cm-1) | (cm-1) | (µm) | (µm) | (cm-1) | (cm-1) | (µm) | (µm) | (cm-1) | (cm-1) | (µm) | (µm) | ||
| 15 | Pure | 1374.5 | 15.5 | 7.275 | 0.0821 | - | - | - | - | - | - | - | - |
| H2O | 1374.5 | 13.5 | 7.275 | 0.072 | 1374.5 | 13.4 | 7.275 | 0.071 | 1374.5 | 13.9 | 7.275 | 0.074 | |
| CO | 1377.4 | 7.9 | 7.260 | 0.041 | 1376.4 | 7.4 | 7.265 | 0.039 | - | - | - | - | |
| CO2 | 1375.5 | 7.7 | 7.270 | 0.041 | 1375.0 | 6.7 | 7.273 | 0.036 | - | - | - | - | |
| CH4 | 1377.4 | 7.4 | 7.260 | 0.039 | 1376.9 | 6.9 | 7.263 | 0.036 | 1375.5 | 7.9 | 7.270 | 0.042 | |
| NH3 | 1375.0 | 14.9 | 7.273 | 0.079 | 1375.0 | 15.5 | 7.273 | 0.082 | 1374.5 | 16.2 | 7.275 | 0.086 | |
| H2O:CO2 | - | - | - | - | 1374.5 | 12.3 | 7.275 | 0.065 | - | - | - | - | |
| 4 comp | - | - | - | - | - | - | - | - | 1376.0 | 14.0 | 7.268 | 0.0740 | |
| 30 | Pure | 1374.3 | 15.3 | 7.277 | 0.081 | - | - | - | - | - | - | - | - |
| H2O | 1375.0 | 13.1 | 7.273 | 0.069 | 1375.0 | 13.0 | 7.273 | 0.069 | 1373.1 | 14.5 | 7.283 | 0.077 | |
| CO | 1377.9 | 8.8 | 7.257 | 0.047 | 1377.9 | 9.8 | 7.257 | 0.052 | - | - | - | - | |
| CO2 | 1375.5 | 7.5 | 7.270 | 0.040 | 1375.0 | 6.6 | 7.273 | 0.035 | - | - | - | - | |
| CH4 | 1377.4 | 7.5 | 7.260 | 0.040 | 1377.4 | 6.7 | 7.260 | 0.035 | 1376.9 | 7.6 | 7.263 | 0.040 | |
| NH3 | 1375.5 | 14.7 | 7.270 | 0.078 | 1375.0 | 15.4 | 7.273 | 0.081 | 1373.1 | 16.0 | 7.283 | 0.085 | |
| H2O:CO2 | - | - | - | - | 1375.0 | 11.9 | 7.273 | 0.063 | - | - | - | - | |
| 4 comp | - | - | - | - | - | - | - | - | 1375.0 | 14.6 | 7.273 | 0.077 | |
| 50 | Pure | 1374.5 | 14.8 | 7.275 | 0.078 | - | - | - | - | - | - | - | - |
| H2O | 1374.5 | 12.1 | 7.275 | 0.064 | 1374.5 | 12.0 | 7.275 | 0.063 | 1372.6 | 14.0 | 7.286 | 0.074 | |
| CO2 | 1375.5 | 7.5 | 7.270 | 0.040 | 1375.0 | 6.5 | 7.273 | 0.035 | - | - | - | - | |
| CH4 | 1375.0 | 13.2 | 7.273 | 0.070 | 1374.0 | 13.3 | 7.278 | 0.071 | 1373.1 | 14.7 | 7.283 | 0.078 | |
| NH3 | 1375.5 | 14.3 | 7.270 | 0.075 | 1375.0 | 15.3 | 7.273 | 0.081 | - | - | - | - | |
| H2O:CO2 | - | - | - | - | 1374.5 | 10.8 | 7.275 | 0.057 | - | - | - | - | |
| 4 comp | - | - | - | - | - | - | - | - | 1375.0 | 12.7 | 7.273 | 0.067 | |
| 80 | Pure | 1374.5 | 14.2 | 7.275 | 0.075 | - | - | - | - | - | - | - | - |
| H2O | 1373.6 | 11.1 | 7.280 | 0.059 | 1374.5 | 11.1 | 7.275 | 0.058 | 1373.1 | 12.9 | 7.283 | 0.068 | |
| CO2 | 1375.5 | 7.8 | 7.270 | 0.041 | 1377.9 | 7.9 | 7.257 | 0.042 | - | - | - | - | |
| NH3 | 1375.0 | 12.9 | 7.273 | 0.068 | 1375.0 | 14.0 | 7.273 | 0.074 | 1373.6 | 14.8 | 7.280 | 0.078 | |
| H2O:CO2 | - | - | - | - | 1374.5 | 10.0 | 7.275 | 0.053 | - | - | - | - | |
| 4 comp | - | - | - | - | - | - | - | - | 1375.0 | 12.6 | 7.273 | 0.066 | |
| 100 | Pure | - | - | - | - | - | - | - | - | - | - | - | - |
| H2O | 1374.0 | 10.3 | 7.278 | 0.054 | 1374.5 | 10.3 | 7.275 | 0.054 | 1373.6 | 12.5 | 7.280 | 0.066 | |
| CO2 | 1377.9 | 10.7 | 7.257 | 0.056 | - | - | - | - | - | - | - | - | |
| NH3 | 1377.9 | 10.3 | 7.257 | 0.054 | 1377.9 | 11.9 | 7.257 | 0.062 | 1374.0 | 13.1 | 7.278 | 0.070 | |
| H2O:CO2 | - | - | - | - | 1375.0 | 9.6 | 7.273 | 0.051 | - | - | - | - | |
| 4 comp | - | - | - | - | - | - | - | - | 1375.5 | 12.5 | 7.270 | 0.066 | |
| 120 | Pure | - | - | - | - | - | - | - | - | - | - | - | - |
| H2O | 1374.0 | 10.1 | 7.278 | 0.054 | 1374.0 | 10.3 | 7.278 | 0.055 | 1373.6 | 11.1 | 7.280 | 0.059 | |
| NH3 | 1371.6 | 2.4 | 7.291 | 0.013 | 1377.9 | 2.4 | 7.257 | 0.013 | 1374.0 | 13.1 | 7.278 | 0.070 | |
| - | 1377.9 | 2.4 | 7.257 | 0.013 | - | - | - | - | - | - | - | - | |
| H2O:CO2 | - | - | - | - | 1374.5 | 10.0 | 7.275 | 0.053 | - | - | - | - | |
| 4 comp | - | - | - | - | - | - | - | - | 1375.0 | 10.8 | 7.27 | 0.057 | |
| 140 | Pure | - | - | - | - | - | - | - | - | - | - | - | - |
| H2O | 1371.6 | 3.1 | 7.291 | 0.016 | 1377.4 | 2.8 | 7.260 | 0.015 | - | - | - | - | |
| 1377.4 | 2.6 | 7.260 | 0.014 | - | - | - | - | - | - | - | - | ||
| H2O:CO2 | - | - | - | - | 1371.6 | 2.9 | 7.291 | 0.014 | - | - | - | - | |
| - | - | - | - | 1377.4 | 2.6 | 7.260 | 0.015 | - | - | - | - | ||
| 4 comp | - | - | - | - | - | - | - | - | 1377.4 | 3.0 | 7.260 | 0.016 | |
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