Table 2. The difference in substituent Charton parameter (Δv) and their corresponding hemiaminal ether dr value for 3.
| Alcohol | Δv | dr |
| PCO | 0.57 | 3.02 |
| MPA | 0.46 | 4.38 |
| 2HA | 0.16 | 2.97 |
| 2PA | 0.16 | 2.67 |
| PEA | 0.05 | 2.01 |
| MBA | 0.24 | 3.03 |
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