Research Article
Synthesis and Characterization of Trivalent Cerium Complexes of p-tert-Butylcalix[4,6,8]Arenes: Effect of Organic Solvents
Table 1
Computed molar extinction coefficients of complexes 1, 2, and 3 in various organic solvents at 25°C.
| Organic solvent | 1 (104 mol−1 dm2)
| 2 (104 mol−1 dm2) | 3 (104 mol−1 dm2) |
|
Polar protic | | | | Methyl alcohol | 5.59 | 6.59 | 6.40 | Ethyl alcohol | 5.11 | 6.07 | 5.87 | n-Amyl alcohol | 4.27 | 2.34 | 2.10 | n-Butyl alcohol | 4.00 | 3.00 | 2.90 | n-Propanol | 3.10 | 2.65 | 2.40 | Methyl isobutyl ketone | 0.80 | 0.50 | 0.50 | Polar aprotic | | | | Acetonitrile | 3.54 | 2.67 | 2.57 | Hexamethylphosphoric triamide
| 2.47 | 0.67 | 0.59 | Dimethyl sulfoxide | 3.14 | 1.70 | 1.60 | Acetone | 3.40 | 1.90 | 1.80 | 1–4 Dioxane | 2.00 | 2.04 | 1.99 | Nonpolar | | | | Benzene | 2.47 | 1.87 | 1.77 | Chloroform | 2.60 | 1.74 | 1.74 | Carbon tetrachloride | 0.42 | 0.34 | 0.32 | Other solvents | | | | Benzonitrile | 2.14 | 1.89 | 1.79 | Dioctyl phthalate | 1.00 | 0.86 | 0.75 |
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