Figure 2
(a) The packing in (II), where brucinium cations (open bonds) form reverse corrugated layers. (b) The packing in brucinium 4-nitrobenzoate 2.6-hydrate (see supplementary material), where brucinium cations form common corrugated layers separated by anion/water sheets. Water molecules and 4-nitrobenzoate anions with occupancy equal to 0.4 have been omitted. Crystals of brucinium 4-nitrobenzoate 2.6-hydrate were grown from ethanol solution. For clarity, H atoms have been omitted. |