“…In these cases, the compounds also exhibit pÁ Á Áp interactions which determine not only the packing of the molecules in the crystals but also molecular conformation. The comparison of the molecular conformation of 13 with its Ph-analogues [22] shows the drastic change of shape of the molecule from extended to angular. There is a number of C-HÁ Á ÁN and C-HÁ Á Áp interactions in the structure of the Ph-analogue, but no stacking interactions were observed.…”