Acta Crystallographica Section C

Crystal Structure Communications

Volume 63, Part 2 (February 2007)

organic compounds

 

(E)-4-(4-Bromophenyldiazenyl)-2,6-dimethylphenyl acrylate and (E)-2,6-dimethyl-4-(4-methylphenyldiazenyl)phenyl acrylate

H. Kocaokutgen, I. Uçar, M. Gür, S. Özkinali and O. Büyükgüngör

Abstract: The crystal structures of the title compounds, C₁₇H₁₅BrN₂O₂, (I), and C₁₈H₁₈N₂O₂, (II), determined at room temperature, have a trans configuration with respect to the diazene linkage, as found for other azo (diazene) derivatives. The aromatic mean planes are nearly coplanar, with a dihedral angle between these planes of 8.31 (2)° for (I) and 3.74 (2)° for (II). In both complexes, the mean plane of the ester group is nearly perpendicular to the aromatic ring planes. In both compounds, the crystal packing involves only - and -ring interactions, which combine to stabilize the extended structure.

Formula: C₁₇H₁₅BrN₂O₂ and C₁₈H₁₈N₂O₂

	Structure factor file (CIF format) (188.7 kbytes) [ doi:10.1107/S0108270106054369/gd3067Isup2.hkl ] Contains datablock I
	Structure factor file (CIF format) (158.4 kbytes) [ doi:10.1107/S0108270106054369/gd3067IIsup3.hkl ] Contains datablock II

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