Table 2. Short hydrogen bonds with O—H donors from the Cambridge Structural Database.
Mean distances and angles are given along with the sample standard deviation†. D, donor; A, acceptor.
| Donor group | Acceptor group | No. of fragments | d(D⋯A) (Å) | ∠(D—H⋯A) (°) |
|---|---|---|---|---|
| Carboxylic acid | Carboxylate | 337 | 2.54 (6) | 169 (8) |
| Carboxylic acid | Amide O | 101 | 2.60 (5) | 165 (9) |
| Phenol | Carboxylate | 44 | 2.64 (8) | 169 (8) |
| Carboxylic acid | Aliphatic OH | 199 | 2.65 (5) | 164 (9) |
| Carboxylic acid | Carboxylic acid | 1358 | 2.65 (4) | 171 (7) |
| Carboxylic acid | Phenol | 18 | 2.67 (7) | 166 (10) |
| Phenol | Amide O | 19 | 2.70 (7) | 168 (9) |
| Phenol | Aliphatic OH | 137 | 2.73 (8) | 162 (11) |
| Phenol | Carboxylic acid | 35 | 2.74 (10) | 160 (15) |
| Aliphatic OH | Carboxylate | 221 | 2.74 (10) | 162 (12) |
| Aliphatic OH | Amide O | 65 | 2.77 (8) | 164 (10) |
| Aliphatic OH | Aliphatic OH | 4931 | 2.78 (8) | 163 (11) |
| Phenol | Phenol | 514 | 2.80 (9) | 159 (14) |
| Aliphatic OH | Imidazole | 7 | 2.80 (14) | 162 (12) |
| Aliphatic OH | Carboxylic acid | 232 | 2.81 (9) | 157 (14) |
| Aliphatic OH | Phenol | 93 | 2.82 (9) | 162 (13) |
†
Sample standard deviation = 
.