Acta Cryst. (2007). E63, o2925-o2927  [ doi:10.1107/S1600536807016820 ]

N,N'-Di-1-naphthylurea revisited

A. M. Z. Slawin, J. Lawson, J. M. D. Storey and W. T. A. Harrison

Abstract: The molecule of the title compound, C₂₁H₁₆N₂O, has crystallographic twofold rotation symmetry, with the C=O group lying on the rotation axis. Intermolecular N-HO hydrogen bonds result in a chain structure containing R₂¹(6) loops. This orthorhombic structure probably represents a correction of a previous study where space group P2₁ was found [Kurth & Lewis (2003), J. Am. Chem. Soc. 125, 13760-13767].

Online 23 May 2007

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