The racemic title compound, C20H20N4O4, crystallizes with Z' = 2 in the space group P2(1)/c. Each independent molecule exhibits approximate twofold rotation symmetry, but conformational differences between the molecules preclude any higher symmetry. The molecules are linked into complex sheets by a combination of four C-H center dot center dot center dot O hydrogen bonds and two C-H center dot center dot center dot pi(arene) hydrogen bonds.
|Number of pages||4|
|Journal||Acta Crystallographica Section C, Crystal Structure Communications|
|Publication status||Published - Sep 2005|