Table 4.
Gibbs free energies of reaction (ΔG, kcal/mol), and rate coefficients (k, M−1 s−1), for the reactions of the PhAs-Cu(II) complexes with the reductants O2•− and Asc−, in aqueous solution at 298.15 K and pH = 7.4.
| O2•− | Asc− | |||
|---|---|---|---|---|
| ΔG | k | ΔG | k | |
| CuII (H2O)4 | −24.01 | 4.67 × 109 | −4.67 | 1.33 × 108 |
| Hn−2COA2– (2)-C2 | −15.06 | 4.61 × 107 | 4.28 | 3.19 × 104 |
| Hn−2FLA2– (2)-C5 | −13.92 | 1.29 × 108 | 5.41 | 6.62 × 104 |
| Hn−2FLA2– (2)-C2 | −14.59 | 3.53 × 107 | 4.74 | 2.09 × 104 |
| Hn−2PRA2– (2)-C7 | 4.13 | 1.39 × 102 | 23.46 | 1.57 × 10−5 |
| Hn−2GAA2– (2)-C7 | 1.35 | 4.75 × 102 | 20.69 | 3.87 × 10−4 |