Figure 12
The asymmetric units of K(Hhba)(H2hba)·H2O, 10, and Rb(Hhba)(H2hba)·H2O, 11, expanded to show the short strong hydrogen bonds present between carboxylate O atoms. Displacement ellipsoids of atoms other than hydrogen are drawn at the 50% probability level. H atoms are represented by spheres of arbitrary size. In the case of both 10 and 11, only one position of a disordered phenolic H atom is shown for clarity. The water molecule in 11 is disordered over two positions; the H atoms on O4 are disordered in both compounds and were not assigned. |