title: 5,5'-Methylenebis[6-amino-3-methyl-2-methylsulfanylpyrimidin-4(3H)-one]: an unusual molecular geometry within a hydrogen-bonded molecular ribbon.
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.
authors.affiliation: Grupo de Investigación en Compuestos, Heterocíclicos-Programa de Química, Facultad de Ciencias Básicas, Universidad del Atlántico, Barranquilla, Colombia.
authors.forename: Jorge
authors.initials: J
authors.lastname: Trilleras
authors.forename: Juan
authors.initials: J
authors.lastname: Ramos
authors.forename: Justo
authors.initials: J
authors.lastname: Cobo
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell
mesh_terms: D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D015394:Molecular Structure; D011743:Pyrimidines / Q000737:chemistry*; D011744:Pyrimidinones / Q000737:chemistry*
chemical_list: C587345:5,5'-methylenebis(6-amino-3-methyl-2-methylsulfanylpyrimidin-4(3H)-one); D011743:Pyrimidines; D011744:Pyrimidinones
keywords: crystal structure; hydrogen bonding; molecular ribbons; pyrimidinones