Table 6. Isomerization Stabilization Energies (ISE’s) of C20-4n[n]CM in Their T1 States at UB3LYP/6-311G(d,p) (Normal Print) and UM06-2X/6-311G(d,p) (Italics) Levels.
| n | PP | FU | CPD | CHD |
|---|---|---|---|---|
| 1 | –22.9, –14.1 | –25.4, –22.3 | –14.2, –12.8 | –7.4, –4.4 |
| 2 | –17.4, –10.3 | –24.3, –24.1 | –9.5, –1.2 | –7.3, –5.1 |
| 5 | –13.1, –7.8 | –19.1, –14.2 | 8.6, 12.1 | 8.1, 12.5 |