Acta Crystallographica, Section C: Crystal Structure Communications p. 102 - 104 (1999)
Update date:2022-08-02
Topics:
Zhang, De-Chun
Fei, Zheng-Hao
Zhang, Tian-Zhu
Zhang, Yan-Qiu
Yu, Kai-Bei
The title molecule, C12H9N5O4, has trans geometry about the azo linkage. The dihedral angle between the two phenyl rings is 6.2(2)°. The whole molecule is almost planar and the maximum deviation from the mean plane is 0.166 (3) A. The resonance effect in the triazene group which might explain the antitumour activity of some triazene derivatives is discussed. In the crystal structure, while the twofold screw-related molecules are packed in a simple herringbone pattern, the inversion-centre-related molecules form hydrogen-bonded dimers which are held together through π...π interactions along the [010] direction.
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