Author/Authors :
Gomes, Lı´gia R. REQUIMTE, Departamento de Química e Bioquímica - Faculdade de Ciências da Universidade do Porto, Portugal , Nicolson Low, John Department of Chemistry - University of Aberdeen, Scotland , Fonseca, Andre CIQUP/Departamento de Química e Bioquímica - Faculdade de Ciências - Universidade do Porto, Portugal , Joao Matos,Maria CIQUP/Departamento de Química e Bioquímica - Faculdade de Ciências - Universidade do Porto, Portugal , Borgesd, Fernanda CIQUP/Departamento de Química e Bioquímica - Faculdade de Ciências - Universidade do Porto, Portugal
Abstract :
Three coumarin derivatives, viz. 6-methyl-N-(3-methylphenyl)-2-oxo-2H-chromene-3-carboxamide, C18H15NO3 (1), N-(3-methoxyphenyl)-6-methyl-2-oxo-2H-chromene-3-carboxamide, C18H15NO4 (2), and 6-methoxy-N-(3-methoxyphenyl)-2-oxo-2H-chromene-3-carboxamide, C18H15NO5 (3), were synthesized and structurally characterized. The molecules display intramolecular N—H⋯O and weak C—H⋯O hydrogen bonds, which probably contribute to the approximate planarity of the molecules. The supramolecular structures feature C—H⋯O hydrogen bonds and π–π interactions, as confirmed by Hirshfeld surface analyses.
