Figure 2
The structure around the tetra-n-butylammonium cation, located at the centre of four cages, viz. two tetrakaidecahedra and two pentakaidecahedra. The butyl groups have two possible sites, with occupancy factors of 50% each. On the other hand, the dodecahedral cages are empty. Therefore, small molecules could be encaged, as shown by the shaded areas. |