title: The molecular and supramolecular structures of the isomeric compounds 5,7-dimethoxyimidazo[1,2-c]pyrimidine and 7-methoxy-1-methylimidazo[1,2-a]pyrimidin-5(1H)-one.
abstract: The supramolecular structures of the isomeric compounds 5,7-dimethoxyimidazo[1,2-c]pyrimidine, C(8)H(9)N(3)O(2), (I), and 7-methoxy-1-methylimidazo[1,2-a]pyrimidin-5(1H)-one, C(8)H(9)N(3)O(2), (II), are determined by weak C-H.N and C-H.O hydrogen bonds in (I), which generate alternating linked centrosymmetric R(2)(2)(8) and R(2)(2)(10) rings that form a ribbon running parallel to the c axis, and by C-H.O bonds in (II), which link the molecules into sheets comprising centrosymmetric R(2)(2)(10) and R(4)(4)(22) rings.
authors.affiliation: Departamento de Química Inorgánica y Orgánica, Universidad de Jaén, 23071 Jaén, Spain.
authors.forename: Jesus
authors.initials: J
authors.lastname: Bueno
authors.forename: Manuel
authors.initials: M
authors.lastname: Melguizo
authors.forename: M Luisa
authors.initials: ML
authors.lastname: Quijano
authors.forename: John Nicolson
authors.initials: JN
authors.lastname: Low