Table 3. Hydrogen bonding and contributions of the O⋯H/H⋯O contacts to the Hirshfeld surfaces of sugar-amino acids.
Notes: (*) All sugar-amino acids are in the pyranose form and all have four hydroxy, one carboxyl and one ammonium group, and one pyranose ring oxygen; (**) hydrogen-bond selection criteria: D⋯A < 2.9 Å; H⋯A < 2.7 Å; D—H⋯A >95°.
| Structure* | No. of CH/CH2/CH3 groups (total C—H) | No. of intra/inter hydrogen-bonds** | % of O⋯H/H⋯O contacts on Hirshfeld surface | Reference |
|---|---|---|---|---|
| GalGly | 3/3/0 (9) | 2/6 | 55.7 | Mossine et al. (1996 ▸) |
| GlcGly | 3/3/0 (9) | 3/6 | 57.6 | Mossine et al. (1996 ▸) |
| FruGly | 3/3/0 (9) | 2/6 | 51.6 | Mossine et al. (1995 ▸) |
| FruAib (IA) | 3/2/2 (13) | 3/5 | 44.0 | This work |
| FruAib (IB) | 3/2/2 (13) | 3/5 | 45.9 | This work |
| FruPro·H2O | 4/5/0 (14) | 3/6 | 49.2 | Mossine et al. (2007 ▸) |
| FruPro·2H2O | 4/5/0 (14) | 3/6 | 49.3 | Tarnawski, Ślepokura et al. (2007 ▸) |
| FruPro·MeOH | 4/5/1 (17) | 4/5 | 40.2 | Tarnawski, Ślepokura et al. (2007 ▸) |