Figure 26
Part of the crystal structure of compound (XII) showing the formation of a centrosymmetric four-ion aggregate. Hydrogen bonds are drawn as dashed lines and, for the sake of clarity, the H atoms bonded to C atoms have been omitted and only the major disorder component is shown. The atoms marked with an asterisk (*) are at the symmetry position (1 − x, 1 − y, 1 − z). |