Table 3. Level of Theory and BSSE-Corrected Interaction Energies (ΔEBSSE, kcal/mol) for the TtBs Present in ATSP Cluster C0–1, C0–2, and C0–3.
| level of theory | ΔEBSSE (c0–1) | ΔEBSSE (c0–2) | ΔEBSSE (c0–3) |
|---|---|---|---|
| B3LYP/def2-SVP (this work) | –3.4 | –1.2 | –2.1 |
| B3LYP-D3/def2-SVP | –3.4 | –1.5 | –2.0 |
| B3LYP-D3/def2-TZVP | –3.5 | –1.6 | –2.1 |
| M06-2X/def2-SVP | –3.4 | –1.3 | –2.1 |
| M06-2X/def2-TZVP | –3.5 | –1.6 | –2.2 |