5,5'-Methylenebis[6-amino-3-methyl-2-methylsulfanylpyrimidin-4(3H)-one]: an unusual molecular geometry within a hydrogen-bonded molecular ribbon.

Acta Crystallogr C

Grupo de Investigación en Compuestos, Heterocíclicos-Programa de Química, Facultad de Ciencias Básicas, Universidad del Atlántico, Barranquilla, Colombia.

Published: September 2013

AI Article Synopsis

  • The compound C13H18N6O2S2 has molecules that align along twofold rotation axes within the C2/c space group.
  • The pyrimidine ring in the molecule is nearly flat, but a bridging methylene carbon is slightly offset from the ring plane.
  • The structure features hydrogen bonds that create S(8) motifs and link multiple molecules into a continuous ribbon of interconnected rings.

Article Abstract

The molecules of the title compound, C13H18N6O2S2, lie across twofold rotation axes in the space group C2/c. Although the pyrimidine ring is effectively planar, the bridging methylene C atom is displaced from the plane of the pyrimidine ring by 0.213 (2) Å, while the C-C-C angle at the bridging C atom is 120.3 (2)°. The molecule contains two symmetry-related N-H···O hydrogen bonds, generating S(8) motifs, and intermoecular N-H···O hydrogen bonds link the molecules into a ribbon of edge-fused rings.

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http://dx.doi.org/10.1107/S0108270113020465DOI Listing

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