Interactions in molecular crystals, 148 - Host/guest-inclusion compounds of N,N '-ditosyl-p-phenylenediamine with furane, benzene and dioxane

Basic principles of known clathrate inclusion compounds are reviewed and of the novel class discovered with N,N'-ditosyl-p-phenylenediamine as a capab le host, three additional molecular aggregates containing five- or six-memb ered, pi- as well as sigma-type rings as guests are reported. All of them c rystallize in the space group P2(1)/c, but only those of furane and benzene are isostructural, whereas that of dioxane differs in the hydrogen bonding network of the N,N'-ditosyl-p-phenylenediamine host exhibiting sulfonamide / sulfonamide cyclic dimers instead of catemer chains. The low-temperature structures of the crystals are discussed in detail including conformationa l differences and packing coefficients to gain some insight in their differ ent weathering behavior observed: clathrate cavity inclusion provides more stable crystals than storage of guest molecules within lattice channels.