title: 1,17-Diphenyl-2,4,6,8,10,12,14,16-octaoxaheptadecane.
abstract: The title compound, C(21)H(28)O(8), crystallizes with two independent molecules, each with a crystallographic twofold axis passing through the central CH(2) group. The two molecules have different orientations of the terminal benzyl groups. The average C-O bond length in the polyoxymethylene helix, corrected for librational motion, is 1.419 A. The molecules are connected into layers by intermolecular C-H...O and C-H...pi(phenyl) interactions.
authors.affiliation: Institut für Organische Chemie, Universität Frankfurt, Max-von-Laue-Strasse 7, D-60438 Frankfurt am Main, Germany. bats@chemie.uni-frankfurt.de
authors.forename: Jan W
authors.initials: JW
authors.lastname: Bats
authors.forename: Christian
authors.initials: C
authors.lastname: Miculka
authors.forename: Christian R
authors.initials: CR
authors.lastname: Noe
mesh_terms: D000473:Alkanes / Q000737:chemistry*; D003460:Crystallization; D018360:Crystallography, X-Ray; D004987:Ethers / Q000737:chemistry*; D006860:Hydrogen Bonding; D008738:Methyl Ethers / Q000737:chemistry*
chemical_list: C519343:1,17-diphenyl-2,4,6,8,10,12,14,16-octaoxaheptadecane; D000473:Alkanes; D004987:Ethers; D008738:Methyl Ethers