Figure 4
Detail of the hydrogen bonding operating in the crystal structure of (I). The charge-assisted amino-N—H⋯Cl− hydrogen bonds are shown as orange dashed lines and lead to helical chains along [100]. The charge-assisted imino-N+—H⋯Cl− hydrogen bonds are shown as blue dashed lines and lead to chains along [011]. For reasons of clarity, H atoms not involved in hydrogen bonding have been omitted and only one of the chains along [011] is shown. |