Datensatz

Zusammenfassung

The molecular and crystal structures of the 1‐benzene (1/2) monohydrate 2 and of the 1‐p‐xylene (1/1) complex 3 were determined by X‐ray analysis. In both complexes the host molecules take the “face to face” conformation. In the 1‐benzene (1/2) monohydrate 2 one benzene ring is perfectly enclosed within the intramolecular cavity of the host. The second benzene ring is located in channel type intermolecular cavities of the crystal lattice. The water molecule in the crystal lattice forms hydrogen bonds to the piperidine‐nitrogens of neighbouring 1‐molecules. – In the 1‐p‐xylene (1/1) complex 3 the host molecules are stacked along the a axis and p‐xylene molecules are sandwiched by two adjacent host molecules in the stack. The two methyl groups of a p‐xylene molecule are inserted into the cavities of the two sandwiching hosts. – The requirements for a preference of intramolecular cavity inclusion over intermolecular lattice inclusion of apolar guests in crystalline complexes of apolar macrocyclic hosts are discussed.