Cheletropic reaction Kinetics Kinetics

| _Butadiene | _10_4_k_min_1_30_C_1_2_absolute | _10_4_k_min_1_30_C_1_2_relative | ΔH_kcal_mol_1 | ΔS_cal_mol_1_K_1 |
|---|---|---|---|---|
| 2-methyl | 1.83 | 1.00 | 14.9 | -15 |
| 2-ethyl | 4.76 | 2.60 | 10.6 | -20 |
| 2-isopropyl | 13.0 | 7.38 | 12.5 | -17 |
| 2-tert-butyl | 38.2 | 20.8 | 10.0 | -19 |
| 2-neopentyl | 17.2 | 9.4 | 11.6 | -18 |
| 2-cloro | 0.24 | 0.13 | N/A | N/A |
| 2-bromoethyl | 0.72 | 0.39 | N/A | N/A |
| 2-p-tolyl | 24.7 | 13.5 | 10.4 | -19 |
| 2-phenyl | 17.3 | 9.45 | N/A | N/A |
| 2-(p-bromophenyl) | 9.07 | 4.96 | N/A | N/A |
| 2,3-dimethyl | 3.54 | 1.93 | 12.3 | -18 |
| cis-1-methyl | 0.18 | 0.10 | N/A | N/A |
| trans-1-methyl | 0.69 | 0.38 | N/A | N/A |
| 1,2-dimethylene-cyclohexane | 24.7 | 13.5 | 11.4 | -16 |