Acta Crystallographica Section C

Crystal Structure Communications

Volume 60, Part 6 (June 2004)

bm1565 scheme

Acta Cryst. (2004). C60, o427-o430 [doi:10.1107/S0108270104008224]

Exo Diels-Alder adducts between ortho- and para-N-acetoxyphenylmaleimides and furan

J. G. Trujillo-Ferrara, E. V. García-Báez, I. I. Padilla-Martínez, F. J. Martínez-Martínez and N. Farfan-García

Abstract: In exo-2-(3,5-dioxo-10-oxa-4-azatricyclo[5.2.1.0^2,6]dec-8-en-4-yl)phenyl acetate, C₁₆H₁₃NO₅, the plane of the acetoxy group lies almost perpendicular to that of the phenyl ring [dihedral angle = 89.8 (1)°], in contrast with the smaller deviations found in the para isomer exo-4-(3,5-dioxo-10-oxa-4-azatricyclo[5.2.1.0^2,6]dec-8-en-4-yl)phenyl acetate, C₁₆H₁₃NO₅, these being 63.6 (1) and 37.0 (1)° for the two crystallographically independent molecules. Irrespective of the position of the acetoxy group, both compounds pack through soft C-HX (X is O or phenyl) interactions, forming interlinked centrosymmetric tetramers in the bc plane.

Formula: Two isomers of C₁₆H₁₃NO₅

Online 22 May 2004


	Structure factor file (CIF format) (145.4 kbytes) Contains datablock I

	Structure factor file (CIF format) (265.7 kbytes) Contains datablock II

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