title: 5,17-Diformyl-25,26,27,28-tetra-propoxy-calix[4]arene.
abstract: The title compound, C42H48O6, was obtained via formyl-ation of 25,26,27,28-tetra-propoxycalix[4]arene with dichloro-methyl methyl ether and tin tetra-chloride. It adopts a pinched cone conformation, which leads to an open cavity. The two opposite aromatic rings bearing formyl groups are almost parallel, making a dihedral angle of 29.1 (2)°. The other pair of opposite rings are close to being perpendicular, making a dihedral angle of 73.6 (1)°. Adjacent rings are almost perpendicular, making dihedral angles of 78.8 (2), 81.6 (1), 78.2 (1) and 74.7 (1)°.
authors.affiliation: Jiangsu Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, People's Republic of China.
authors.forename: Zhengyi
authors.initials: Z
authors.lastname: Li
authors.forename: Hongzhao
authors.initials: H
authors.lastname: Ma
authors.forename: Yuan
authors.initials: Y
authors.lastname: Lai
authors.forename: Liang
authors.initials: L
authors.lastname: Chen
authors.forename: Xiaoqiang
authors.initials: X
authors.lastname: Sun