Acta Cryst. (2005). E61, o2596-o2598  [ doi:10.1107/S1600536805022257 ]

2,9-Dichloro-5,12-dihydroquino[2,3-b]acridine-7,14-dione (red phase)

T. Senju, N. Nishimura, T. Hoki and J. Mizuguchi

Abstract: The title compound, C₂₀H₁₀Cl₂N₂O₂, is one of the quinacridone derivatives known as a red pigment. The molecule has inversion symmetry. The quinacridone molecules are connected by bifurcated N-HO hydrogen bonds along [110] to form a two-dimensional hydrogen-bond network.

Online 16 July 2005

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