Figure 3
Schematic representations of selected parts of the hydrogen-bonding networks in the discussed structures, showing (a) chain formation by single O—H⋯N interactions (green) observed in the crystal structure of taci·2H2O (Hegetschweiler et al., 1993), (b) chain formation by the pairwise R22(10) interaction of a vicinal HO—CH2—CH2—NH2 group (type A, red), as observed for the Htaci+ cation in the crystal structure of taci·HI (X = NH3+; Reiß et al., 1999) and for taci in (I) (X = NH2), and (c) chain formation by alternate HO—CH2—CH2—NH2 (type A, red) and HO—CH2—CH2—NH3+ (type B, blue) pairing observed for the Htaci+ cation in (I). |