Figure 10
Part of the crystal structure of compound (IV) showing the formation of a centrosymmetric four-ion aggregate containing R12(6), R44(12) and R44(16) ring types. Hydrogen bonds are drawn as dashed lines and, for the sake of clarity, the H atoms bonded to C atoms have been omitted. The atoms marked with an asterisk (*) are at the symmetry position (1 − x, 1 − y, 1 − z). |