Table 3.
Effect of varying temperature and values of thermodynamic parameters for the oxidation of IMP and CLM by CAT in acid medium
| Temperature | 104 k/ (s-1) (103k3(s-1))a | |
|---|---|---|
| (K) | IMP | CLM |
| 290 | 3.90 (1.66) | 2.58 (1.11) |
| 295 | 4.86 ( ---) | 3.36 ( ---) |
| 300 | 7.54 (2.50) | 4.80 (1.43) |
| 305 | 9.98 (3.30) | 5.92(2.0) |
| 310 | 15.8 (4.0) | 9.40 (2.64) |
| Ea (kJ mol -1) | 38.3 (32.6) | 46.7 (38.5) |
| ∆H≠ (kJ mol-1) | 35.8 (30.1)±0.01 | 44.2 (35.8)±0.01 |
| ∆G≠ (kJ mol-1) | 91.5 (88.6)±0.09 | 92.7 (90.0)±0.002 |
| ∆S≠ (JK-1 mol-1) | -185 (-194)±0.03 | -161 (-180)±0.08 |
| Log A | 6.94±0.06 | 8.56±0.24 |
aValues in the parantheses refer to the rate-determining step.
[CAT]o = 2.0 x 10-4 mol dm-3; [TCA]o = 4. 0 x 10-3 mol dm-3; [HClO4] = 2.9 x 10-3 mol dm-3.