In recent years, porous organic cages have gained in importance, inter alia, due to their ability to be processed from solution. Especially the packing of the cages in the solid state structure has a significant effect on the porosity. Therefore, it is important to be able control the packing pattern either by crystallization conditions or the interaction of molecular units, defined as crystal engineering synthons. Here, tribromoarene subunits as such are incorporated into cage …