4-Oxo-N-phenyl-4H-chromene-2-carboxamide and of a new polymorph of 7-methoxy-4-oxo-N-p-tolyl-4H-chromene-2-carboxamide and its hemihydrate

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Joana Reis (Autor) Outra; Alexandra Gaspar (Autor) Outra; Fernanda Borges (Autor) FCUP; Ligia R Gomes (Autor) Outra; John Nicolson Low (Autor) Outra

Revista

Título: Acta Crystallographica Section C: Crystal Structure Communications

Vol. 69

ISSN: 0108-2701

Editora: Blackwell

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 4 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-006-JDR

Abstract (EN): 4-Oxo-N-phenyl-4H-chromene-2-carboxamide, C16H11NO3, crystallizes in the space group P2(1)/n and its derivative 7-methoxy-4-oxo-N-p-tolyl-4H-chromene-2-carboxamide, C18H15NO4, forms two polymorphs which crystallize in the space groups P2(1)/c and P (1) over bar. The structures have an anti-rotamer conformation about the C-N bond; however, the amide O atom can be either trans-or cis-related to the O atom of the pyran ring. The latter compound also crystallizes as a hemihydrate, C18H15NO4 center dot 0.5H(2)O, in the space group C2/c. This compound has a similar structure to that of the unsolvated compound.

Idioma: Inglês

Tipo (Avaliação Docente): Científica