Table 2. Calculated interactions between pyrrole and co-vapors*.
| Pyrrole/Co-vapor | 3D graphic** | Energy (a.u.) | Dipole moment (D) | H-bonding |
|---|---|---|---|---|
| Pyrrole/Pyrrole |  |
−418.0 | 3.25 | None |
| Pyrrole/Methanol |  |
−324.1 | 5.35 | Possible |
| Pyrrole/Ethanol |  |
−363.2 | 4.80 | Possible |
| Pyrrole/Water |  |
−285.0 | 5.09 | Possible |
| Pyrrole/Hexane |  |
−444.8 | 1.94 | None |
| Pyrrole/Toluene |  |
−479.1 | 2.44 | None |
| Pyrrole/Benzene |  |
−440.0 | 2.02 | None |
*All calculations were carried out using the Gaussian 09 program suite.
**The dotted line indicates hydrogen bond between the corresponding atoms.