Acta Crystallographica Section C

Crystal Structure Communications

Volume 62, Part 3 (March 2006)


organic compounds



em1003 scheme

Acta Cryst. (2006). C62, o125-o128    [ doi:10.1107/S0108270106002186 ]

Two isomeric butadiene-N-(acetoxyphenyl)maleimide Diels-Alder adducts: supramolecular structure directed by C-H...X (X = O and [pi]) hydrogen bonds and perpendicular dipole carbonyl-carbonyl interactions

J. G. Trujillo-Ferrara, R. L. Santillán-Baca, N. Farfán-García, I. I. Padilla-Martínez and E. V. García-Báez

Abstract: The molecular and supramolecular structures of 2-(1,3-dioxo-2,3,3a,4,7,7a-hexahydro-1H-isoindol-2-yl)phenyl acetate, C16-H15NO4, (I), and its para isomer, 4-(1,3-dioxo-2,3,3a,4,7,7a-hexahydro-1H-isoindol-2-yl)phenyl acetate, (II), are reported. The torsion angle between the succinimide and benzene rings depends on the position of the acetoxy substitution [89.7 (1) and 61.9 (1)° for (I) and (II), respectively]. The twist of the acetoxy group relative to the mean plane of the benzene ring is almost independent of the acetoxy position [66.0 (1) and 70.0 (1)°]. Packing interactions for both compounds include soft C-H...X (X = O and Ph) interactions, forming chains of centrosymmetric dimers and interlinked chains for (I) and (II), respectively. In addition, three perpendicular dipole C=O...C=O interactions contribute to the supramolecular structure of (II).

Formula: C16H15NO4


hkldisplay filedownload file

Structure factor file (CIF format) (161.4 kbytes)
[ doi:10.1107/S0108270106002186/em1003Isup2.hkl ]
Contains datablock I


hkldisplay filedownload file

Structure factor file (CIF format) (169.2 kbytes)
[ doi:10.1107/S0108270106002186/em1003IIsup3.hkl ]
Contains datablock II


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