title: Partial cone conformer of 25,27-bis-[(methoxy-carbonyl)-meth-oxy]-26,28-dipropoxycalix[4]arene.
abstract: Mol-ecules of the title compound, C(40)H(44)O(8), adopt a partial cone conformation. The dihedral angles between the planes of the aromatic rings and the mean plane through the methyl-ene C atoms bridging the aromatic rings are 35.74 (7), 85.86 (5), 87.77 (4) and 89.95 (5)°. Two opposite aryl rings are approximately parallel to each other; the others are at an inter-planar angle of 52.41 (6)°. Intra- and inter-molecular C-H⋯O hydrogen bonds stabilize the mol-ecular conformation and the crystal packing. Two C atoms of one propoxy chain are disordered over two positions; the site occupancy factors are ca 0.66 and 0.34.
authors.affiliation: Department of Chemistry, Shandong Normal University, Jinan 250014, People's Republic of China.
authors.forename: Guo-Zhi
authors.initials: GZ
authors.lastname: Zhang
authors.forename: Mei
authors.initials: M
authors.lastname: Zhao
authors.forename: Xiao-Ling
authors.initials: XL
authors.lastname: Zhang
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Ma
authors.forename: Dian-Shun
authors.initials: DS
authors.lastname: Guo