Table 2. Covalent C=O/N+—O− bond lengths (Å) in 2 and related structures.
| Compound | C=O/N+—O− | N+—O−/C=O |
|---|---|---|
| SAWYAR | 1.240 (4) | 1.241 (4) |
| SAZQIU | 1.253 (2) | 1.243 (4) |
| 2 | 1.252 (1) | 1.248 (1) |
| Compound | C=O/N+—O− | N+—O−/C=O |
|---|---|---|
| SAWYAR | 1.240 (4) | 1.241 (4) |
| SAZQIU | 1.253 (2) | 1.243 (4) |
| 2 | 1.252 (1) | 1.248 (1) |