Table 1. Number of structures in the CSD (Version 5.35, November 2013) containing at least one carboxyl, carboxylate or metal-bound carboxyl(ate) group and number of structures with low R-factor values (R 0.05). Disordered, error-containing, polymeric and powder structures were excluded from the search.
| All | R 0.05 | |
|---|---|---|
| Carboxyl | 14452 | 8254 |
| Carboxylate | 9283 | 5446 |
| Metal-bound carboxyl | 492 | 305 |
| Metal-bound carboxylate | 13438 | 9082 |
| Total | 37665 | 23087 |