Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 2 (February 2013)

organic compounds

Acta Cryst. (2013). E69, o297-o298    [ doi:10.1107/S1600536813002250 ]


R. Kant, V. K. Gupta, K. Kapoor, D. R. Patil, D. R. Chandam and M. B. Deshmukh

Abstract: The asymmetric unit of the title compound, C25H31NO4, contains two independent mol­ecules. In one mol­ecule, the benzene ring and an attached meth­oxy group were refined as disordered over two sets of sites in a 0.65 (4): 0.35 (4) ratio. In both mol­ecules, the central ring of the acridinedione system adopts a flattened boat conformation. The four essentially planar atoms of this ring [maximum deviations = 0.006 (5) Å in both mol­ecules] forms dihedral angles of 86.8 (2) and 87.6 (2)°, respectively, with the major and minor components in the disordered benzene ring and 87.3 (2)° with the benzene ring in the fully ordered mol­ecule. The two outer rings of the acridinedione system adopt sofa conformations in both mol­ecules. In the crystal, N-H...O hydrogen bonds form two independent chains along [100]. C-H...O hydrogen bonds link the chains, forming a three-dimensional network.

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