Table 3. Close Contacts with CH3 Hydrogens in the Modeled Structures and Olefin Bond Lengthsa.
| model | close contactsb | distance (Å) | olefin bond length (Å) |
|---|---|---|---|
| alkane C–C | none | none | 1.54 |
| alkene C=C | none | none | 1.34 |
| SW1 | C–Ha···B11 | 2.89 | 1.340 |
| BN | C–Ha···N74 | 2.90 | 1.456 |
| C–Ha···B7 | 2.86 | ||
| C–Hb···B37 | 2.91 | ||
| C–Hb···B2 | 2.95 | ||
| SW2 | C–Ha···B35 | 2.86 | 1.537 |
| C–Hb···B2 | 2.81 | ||
| VN | C–Ha···B35 | 2.84 | 1.566 |
| C–Ha···N64 | 2.88 | ||
| C–Hb···B35 | 2.77 | ||
| VB | C–Ha···N69 | 2.72 | 1.568 |
| C–Hb···N69 | 2.79 | ||
| C–Hb···B34 | 2.80 |
Both SW1 and SW2 consist of two five-membered rings and two seven-membered rings. SW1 is distorted away from the substrate and SW2 is distorted toward the substrate.
Numbering refers to the model structures provided in the Supporting Information.