Table 3.
Selected Kinetic Parameters for the Formation of 1:1 Cu:O2 Adducts
| ligand (solvent) | kon (M−1 s−1) | ΔH‡on (kcal mol−1) | ΔS‡on (cal mol−1 K−1) | koff (M−1 s−1) | ΔH‡off (kcal mol−1) | ΔS‡off (Cal mol−1 K−1) | ref |
|---|---|---|---|---|---|---|---|
| L2d (THF) | (1.560 ± 0.019) × 103a | 4.3 ± 0.5 | −23.9 ± 2.4 | – | – | – | 151 |
| L23a (acetone) | 4.1 × 107b | −1.6 ± 0.2 | −31 ± 1 | 2.4 × 10−2b | 10.5 ± 0.5 | –11 ± 2 | 164 |
| L42a (EtCN) | (9.5 ± 0.4) × 104b | 4.1 ± 0.1 | −12.4 ± 0.7 | (7.0 ± 0.3) × 10−2b | 14.8 ± 0.1 | 18.2 ± 0.7 | 144 |
| L44 (MeTHF) | (2.1 ± 1.0) × 106c | 2 ± 1 | −17 ± 6 | (5.2 ± 2.0) × 102c | 11 ±2 | 10 ± 8 | 160 |
| L41a (THF) | (1.5 ± 0.02) × 108c | 1.82 | −10.8 | 240 ± 6c | 13.9 | 25.1 | 163 |
| L41d (MeTHF) | (6.6 ± 3.5) × 105c | 2.2 ± 0.2 | −23 ± 2 | – | – | – | 160 |
| L43c (THF) | (6.9 ± 0.02) × 107c | 7.67 | 19.1 | 470 ± 0.02c | 15.9 | 37.5 | 161 |
| L40a (THF) | (1.8 ± 0.03) × 108c | 5.59 | 8.39 | 1600 ± 0.05c | 15.4 | 35.9 | 161 |
| L36 (THF) | (7.6 ± 0.2) × 10−1b | 5.83 ± 0.31 | −26.3 ± 1.7 | (1.1 ± 0.1) × 10−3b | 8.10 ± 0.26 | −3 ± 1 | 162 |
a
At 223 K.
b
At 183 K.
c
At 193 K.