Table 2. Summary of experimental Raman shifts in the co-crystal compared with pure substances, from work by Vu et al. (2014 ▸).
At 80 K, the crystal structure of ethane is assumed to have been the monoclinic phase of ethane, as described by van Nes & Vos (1978 ▸), rather than the plastic cubic phase that exists at ∼ 90 K
| ν1(a 1g) CH3 sym stretch (cm−1) | ν11(eg) CH3 deform. stretch (cm−1) | ν1(a 1g) CH sym stretch (cm−1) | ν7(e 2g) CH asym stretch (cm−1) | ν7(e 2g) CH asym stretch (cm−1) | |
|---|---|---|---|---|---|
| Benzene in co-crystal at 90 K | – | – | 3063.6 | 3040.6 | 3047.1 |
| Solid benzene at 90 K | – | – | 3063.3 | 3043.7 | 3048.9 |
| Ethane in co-crystal at 90 K | 2872.6 | 1454.8 | – | – | – |
| Solid (monoclinic) ethane at 80 K | 2877.0 | 1461.5 | – | – | – |
| Liquid ethane at 90 K | 2884.8 | 1467.1 | – | – | – |