title: 2-Amino-4-chloro-5-formyl-6-[methyl(2-methylphenyl)amino]pyrimidine and 2-amino-4-chloro-5-formyl-6-[(2-methoxyphenyl)methylamino]pyrimidine are isostructural and form hydrogen-bonded sheets of R2(2)8 and R6(6)32 rings.
abstract: 2-Amino-4-chloro-5-formyl-6-[methyl(2-methylphenyl)amino]pyrimidine, C(13)H(13)ClN(4)O, (I), and 2-amino-4-chloro-5-formyl-6-[(2-methoxyphenyl)methylamino]pyrimidine, C(13)H(13)ClN(4)O(2), (II), are isostructural and essentially isomorphous. Although the pyrimidine rings in each compound are planar, the ring-substituent atoms show significant displacements from this plane, and the bond distances provide evidence for polarization of the electronic structures. In each compound, a combination of N-H...N and N-H...O hydrogen bonds links the molecules into sheets built from centrosymmetric R(2)(2)(8) and R(6)(6)(32) rings. The significance of this study lies in its observation of the isostructural nature of (I) and (II), and in the comparison of their crystal and molecular structures with those of analogous compounds.
authors.affiliation: Grupo de Investigación de Compuestos Heterocíclicos, Departamento de Química, Universidad de Valle, AA 25360 Cali, Colombia.
authors.forename: Jorge
authors.initials: J
authors.lastname: Trilleras
authors.forename: Jairo
authors.initials: J
authors.lastname: Quiroga
authors.forename: Justo
authors.initials: J
authors.lastname: Cobo
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell