1-[1,4-Bis(but-3-en-1-yl­oxy)]-2,3,4,5-(1,4-dimeth­oxy)pillar[5]arene–1,4-di­bromo­butane 1:1 inclusion complex

In the title compound, C(51)H(58)O(10)·C(4)H(8)Br(2), both the host and guest are completed by crystallographic twofold symmetry (one carbon atom of the host lies on the rotation axis). The penta­gonal-shaped macrocycle has a pair of butene­oxy substituents on one of its faces and one mol­ecule of 1,4-di­bromo­butane is encapsulated within the cavity of the pillararene, forming a 1:1 inclusion complex. The terminal alkene parts, which project outwards from the pillararene ring, exhibit positional disorder over two sets of sites in a 0.52 (2): 0.48 (2) ratio. The host and guest inter­act via C—H⋯O, C—H⋯Br and C—H⋯π inter­actions and adjacent host mol­ecules inter­act via C—H⋯O and C—H⋯π bonds. [Image: see text]