Table 2.
Metal | Rate (s-1) | Half-life (min) | Enhancement over metal-free HCM |
---|---|---|---|
4 °C | |||
Metal-free: P3bare | 2.0(1) × 10-3 | 6 | 0.8 |
NiII: P3bare | 1.7(3) × 10-3 | 7 | 0.9 |
Metal-free | 1.6(2) × 10-3 | 7 | 1 |
NiII | 1.7(2) × 10-5 | 700 | 96.7 |
CuII | 1.9(2) × 10-4 | 60 | 8.4 |
ZnII | 4.1(6) × 10-5 | 280 | 38.8 |
25 °C | |||
Metal-free | 5.0(6) × 10-3 | 2 | 1 |
NiII | 1.1(1) × 10-4 | 106 | 53 |
CuII | 2.3(2) × 10-3 | 5 | 2.5 |