Hauptinhalt
Tetra-N-alkyl-substituierte Harnstoff-Derivate
| Solvent | ET(30)/kcal/mol |
| 1,1,3,3-Tetramethylharnstoff | 40.9 |
| 1,1,3,3-Tetramethylguanidin | 39.3 |
| 1,3-Dimethylimidazolidin-2-on, Dimethylethylenharnstoff | 42.5 |
| Hexahydro-1,3-dimethyl-2-oxopyrimidin, Dimethylpropylenharnstoff | 42.1 |