Table 2.
Spectral parameters of 4-CI in different solvents, arranged in order of increasing R value.
| Solvent | ω1, cm−1 | ω2, cm−1 | Δ, cm−1 | R | W, cm−1 | Δ0, cm−1 |
|---|---|---|---|---|---|---|
| DMSO | 2213.3 | 2229.1 | 15.8 | 0.66 | 7.73 | 3.24 |
| DMF | 2213.8 | 2229.1 | 15.3 | 0.71 | 7.54 | 2.59 |
| Pyridine | 2214.2 | 2229.1 | 14.9 | 0.84 | 7.42 | 1.30 |
| THF | 2215.1 | 2229.7 | 14.6 | 0.91 | 7.29 | 0.69 |
| Toluene | 2217.0 | 2230.4 | 13.4 | 1.06 | 6.70 | 0.39 |
| Cyclopentanone | 2214.0 | 2228.5 | 14.5 | 1.08 | 7.24 | 0.55 |
| 1,4-dioxane | 2216.1 | 2230.5 | 14.4 | 1.21 | 7.17 | 1.36 |
| DCM | 2216.4 | 2230.5 | 14.1 | 1.24 | 7.01 | 1.51 |
| Methanol | 2217.2 | 2233.3 | 16.1 | 1.25 | 8.00 | 1.79 |
| Ethanol | 2216.9 | 2233.1 | 16.2 | 1.34 | 8.01 | 2.35 |
| Isopropanol | 2216.9 | 2233.6 | 16.6 | 1.42 | 8.22 | 2.89 |
| Butanol | 2216.8 | 2233.5 | 16.7 | 1.52 | 8.17 | 3.45 |
| Trifluoroethanol | 2220.3 | 2239.9 | 19.6 | 2.59 | 8.79 | 8.68 |
| Acetic acid | 2217.4 | 2235.1 | 17.7 | 2.61 | 7.92 | 7.89 |