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Title: | l-Tryptophan 4-nitro-phenol tris-olvate | Authors: | Rodrigues, V. H. Costa, M. M. R. R. Belsley, M. S. Gomes, E. D. de Matos |
Keywords: | single-crystal X-ray study; T = 291 K; mean (C–C) = 0.003 A°; R factor = 0.035; wR factor = 0.101; data-to-parameter ratio = 10.5. | Issue Date: | 1-Mar-2012 | Publisher: | International Union of Crystallography | Project: | FCT - project PEst-C/FIS/UI0036/2011 | Serial title, monograph or event: | Acta Crystallographica Section E: Structure Reports Online | Volume: | 68 | Issue: | Pt 3 | Abstract: | The title compound, C(11)H(12)N(2)O(2)·3C(6)H(5)NO(3), comprises a zwitterionic amino acid formed by two nearly planar groups: (i) the indole ring and Cβ, and (ii) the carboxyl group, Cα, as well as the amine N atom, with r.m.s. deviations of 0.0084 and 0.0038 Å, 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 π-π stacking interactions. The intermolecular cohesion of all organic residues in each of the latter two-dimensional networks is achieved via strong hydrogen bonding, nitro-π and π-π stacking interactions. | URI: | https://hdl.handle.net/10316/109821 | ISSN: | 1600-5368 | DOI: | 10.1107/S1600536812007817 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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