Container crushing: Thermal liberation of the encapsulated guest in a cryptophane has been shown to cause conformational “implosion” in the solid state. The resulting collapsed form is kinetically stable, can be isolated, and its unexpected structure has been elucidated by X‐ray diffraction. It eventually re‐inflates, however, to the occupied container‐like species on standing in solution (see scheme).
Partial collapse of the ladder-shaped tunnels of a crystalline cryptophane derived coordination polymer is monitored by single crystal X-ray diffraction.
In the title compound, C26H28O8, the central aromatic ring forms dihedral angles of 24.32 (11) and 80.19 (7)° with the two adjoining vanillyl alcohol rings. In the crystal, O—H⋯O hydrogen bonds connect the molecules, forming a hydrogen-bonded sheet-like motif extended in the ab plane.
In the title compound, C8H7Br2NO2, an intermediate for the synthesis of macrocycles, the NO2 group makes a dihedral angle of 65.07 (19)° with the arene ring, and the bromomethyl substituents adopt a trans conformation about the ring such that the molecule closely approximates C2 symmetry.
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