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Table 1
Selected bands of acetaldehyde, ethanol, and dimethyl ether.
| Species | Formula | Mode | Peak position* | A′ | |||
|---|---|---|---|---|---|---|---|
| cm−1 | μm | cm mol−1 | |||||
 | Acetaldehyde | CH3CHO | CH3 rock. + CC stretch. | 1122.3 | 8.909 | ||
| + CCO bend. | |||||||
| CH3 s-deform. + CH wag. | 1346.2 | 7.427 | |||||
| CH3 deform. | 1429.4 | 6.995 | |||||
| CO stretch. | 1723.0 | 5.803 | 1.3 × 10−17 a | ||||
 | Ethanol | CH3CH2OH | CC stretch. | 879.8 | 11.36 | 3.24 × 10−18 b | |
| CO stretch. | 1051.0 | 9.514 | 1.41 × 10−17 b | ||||
| CH3 rock. | 1090.5 | 9.170 | 7.35 × 10−18 b | ||||
| CH2 tors. | 1275.2 | 7.842 | |||||
| OH deform. | 1330.2 | 7.518 | |||||
| CH3 s-deform. | 1381.3 | 7.240 | |||||
 | Dimethyl ether | CH3OCH3 | COC stretch. | 921.3 | 10.85 | 5.0 × 10−18 c | |
| COC stretch. + CH3 rock. | 1093.9 | 9.141 | 9.2 × 10−18 c | ||||
| COC stretch. + CH3 rock. | 1163.8 | 8.592 | 9.8 × 10−18 c | ||||
| CH3 rock. | 1248.2 | 8.011 | |||||
Notes. (*) Peak position of the pure molecule at 15 K. Note that throughout literature there seems to be disagreement in the assignment of certain modes, particularly for ethanol. References. (a) Schutte et al. (1999). (b) Hudson (2017). (c) This work.
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