Figure 4
Hydrogen-bonding scheme between water molecules and COO− groups showing the formation of right-handed (A) and left-handed (B) helices. Adamantyl fragments are omitted for clarity. [Symmetry codes: (iv) + x, − y, 1 − z; (v) − + x, − y, 1 − z; (vi) 1 − x, y, − z; (vii) − x, − y, + z.] |