Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 10 (October 2013)

organic compounds

Acta Cryst. (2013). E69, o1494-o1495    [ doi:10.1107/S160053681302391X ]

(3S,3aS,6R,6aR)-2-Oxohexa­hydro­furo[3,2-b]furan-3,6-diyl dibenzoate

V. Piccialli, G. Oliviero, S. Zaccaria, R. Centore and A. Tuzi

Abstract: The title compound, C20H16O7, contains a cis-fused [gamma]-lactone tetra­hydro­furan ring system functionalized with two benzo­yloxy groups. Both rings adopt an envelope conformation. The mol­ecule assumes an elongated shape and exibits non-crystallographic C2 symmetry. The benzo­yloxy groups are almost planar [maximum deviations of 0.0491 (15) and 0.0336 (17) Å for the O atoms] and their mean planes are inclined to one another by 16.51 (4)°. The crystal packing features weak C-H...O inter­actions. The aryl groups of adjacent mol­ecules are parallel shifted with face-to-face contacts and a shortest inter­molecular C...C distance of 3.482 (4) Å.

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