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Acta Cryst. (2013). C69, 1534-1536  [ doi:10.1107/S0108270113030746 ]

Imidazolidin-2-one: pseudosymmetry and twinning

C. Taouss, P. G. Jones and D. J. Tindall

Synopsis: The imidazolidin-2-one ring displays a half-chair conformation. N-H...O hydrogen bonds connect the mol­ecules to form R_{2}^{2}(8) rings and thence ribbons parallel to the a and b axes. The crystal was merohedrally twinned.

Formula: C3H6N2O

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