Table 7.
Parametersa of the intramolecular hydrogen bonds in the X-ray structures solved in this work.
| Peptide | Donor (D) | Acceptor (A) | d (H⋯A) | d (D⋯A) | < (D-H⋯A) | H-bonded conformation |
|---|---|---|---|---|---|---|
| Piv-Pro-Ac3c-Val-NHMe (2b) | (Val)NH | (Piv)CO | 2.35 | 3.034(5) | 129 | C10 |
| MeNH | (Piv)CO | 1.86 | 2.852(6) | 150 | C13 | |
| Piv-Pro-Ac5c-Val-NHMe (3b) | (Val)NH | (Piv)CO | 2.13 | 3.201(3) | 168 | C10 |
| Piv-Ac5c-Val-NHMe (6b) | MeNH | (Piv)CO | 1.92 | 2.934(3) | 163 | C10 |
Distances (d) in Å; angles in degrees.