title: Bis{5-[(2-propyn-1-yl-oxy)meth-yl]-1,3-phenyl-ene}-32-crown-10.
abstract: The mol-ecule of the title compound {systematic name: 17,35-bis-[(2-propyn-1-yl-oxy)meth-yl]-2,5,8,11,14,20,23,26,29,32-deca-oxatricyclo-[31.3.1.1(15,19)]octa-triaconta-1(37),15,17,19 (38),33,35-hex-a--ene}, C(36)H(48)O(12), has crystallographic inversion symmetry and adopts a chair-like conformation. The polyether bridges of the macrocycle adopt gauche conformations and the cavity of the macrocycle is collapsed. In the crystal structure, there are weak inter-molecular C-H⋯O hydrogen bonds driven in part by the elevated acidity of acetylenyl H atoms.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510006,  People's Republic of China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Yang
authors.forename: Zhi-Kai
authors.initials: ZK
authors.lastname: Xu
authors.forename: Deng-Ke
authors.initials: DK
authors.lastname: Yang
authors.forename: Shao-Wu
authors.initials: SW
authors.lastname: Pan
authors.forename: La-Sheng
authors.initials: LS
authors.lastname: Jiang