Acta Cryst. (2010). E66, o1183  [ doi:10.1107/S1600536810014728 ]

Ethyl 5-oxo-2,3-diphenylcyclopentane-1-carboxylate

C. N. Lamb, Z. Assefa and R. E. Sykora

Abstract: The title compound, C₂₀H₂₀O₃, was prepared by an acyloin-type condensation reaction in the presence of sodium sand and dry ether using ethyl cinnamate as the starting material. The C-O bond lengths for the carbonyl groups are 1.191 (2) and 1.198 (2) Å, while the C-O bond in the ester group is 1.335 (2) Å. The C-C bond lengths in the phenyl groups average 1.375 Å, while the C-C bonds in the cyclopentanone ring average 1.525 Å, indicating single C-C bonds in the latter.

Online 28 April 2010

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