L-Tryptophan 4-nitrophenol trisolvate

• Autor(a) principal: Rodrigues, Vitor
• Data de Publicação: 2012
• Outros Autores: Costa, Margarida, Belsley, M., Gomes, E. Matos
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/1822/22198
• topic: data-to-parameter ratio = 10.5; mean s(C-C) = 0.003 Å; R factor = 0.035; single-crystal X-ray study; T = 291 K; wR factor = 0.101; Science & Technology

The title compound, C11H12N2O2 3C6H5NO3, comprises a zwitterionic amino acid formed by two nearly planar groups: (i) the indole ring and C , and (ii) the carboxyl group, C , as well as the amine N atom, with r.m.s. deviations of 0.0084 and 0.0038 A ˚ , respectively. The angle between these idealized planes is 39.47 (9) . The amine group of the amino acid is in a syn ( sc) arrangement relative to the ring system. The overall crystal structure results from the packing of sheets parallel to the (001) planes. These sheets are formed by a pair of screw axis related parallel networks bound by hydrogen-bond and – stacking interactions. The intermolecular cohesion of all organic residues in each of the latter two-dimensional networks is achieved via strong hydrogen bonding, nitro– and – stacking interactions.