title: 6-{[(Benz-yloxy)carbon-yl]-oxy}-2-methyl-hexa-hydro-pyrano[3,2-d][1,3]dioxin-7,8-diyl bis-(chloro-acetate).
abstract: The asymmetric unit of the title compound, C(20)H(22)O(10)Cl(2), consists of a 6-{[(benz-yloxy)carbon-yl]-oxy}group and two chloro-acetate groups bonded to a 2-methyl-hexa-hydro-pyrano[3,2-d][1,3]dioxin group at the carbon 1,2 and 3 positions, respectively, of a pyrano ring fused to a dioxin ring. The dihedral angle between the mean planes of the dioxin and benzyl rings is 42.2 (2)°. An extensive array of weak inter-molecular C-H⋯O hydrogen bonds links the mol-ecules into chains along [011]. Additional weak inter-molecular C-H⋯π inter-actions occur between C-H atoms of the dioxin and benzyl rings and a nearby benzene ring. A MOPAC geometry optimization calculation in vacuo revealed that the dihedral angle between the mean planes of the dioxin and benzyl rings increased by 24.42 to 66.64°, suggesting that the weak inter-molecular hydrogen-bonding inter-actions, in coord-ination with weak C-H⋯π inter-actions, influence the geometry of the resultant crystalline species and help to stabilize the crystal packing.
authors.forename: Jerry P
authors.initials: JP
authors.lastname: Jasinski
authors.forename: Ray J
authors.initials: RJ
authors.lastname: Butcher
authors.forename: M T
authors.initials: MT
authors.lastname: Swamy
authors.forename: H S
authors.initials: HS
authors.lastname: Yathirajan
authors.forename: B
authors.initials: B
authors.lastname: Narayana