TABLE 2.
Difference in Energy between the Most Stable Salt-Bridge Conformer (I1) and the Most Stable Ion–Molecule Form (III1) Calculated Using Density Functional Theorya
| functional | basis | energy diff (kcal/mol) |
|---|---|---|
| EDF1 | 6-31+G*//6-31G* | 7.2 |
| EDF1 | 6-31++G**//6-31++G** | 5.7 |
| B3LYP | 6-31+G*//6-31+G* | 10.0 |
| B3LYP | 6-311++G**//6-31+G* | 7.7 |
A positive value indicates that the salt bridge is more stable.