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Title: | Pyromellitic acid-sarcosine (1/2) | Authors: | Domingos, S. R. Silva, Manuela Ramos Martins, Nuno D. Beja, Ana Matos Paixão, J. A. |
Keywords: | single-crystal X-ray study; T = 293 K; mean (C–C) = 0.002 A°; R factor = 0.042; wR factor = 0.115; data-to-parameter ratio = 14.2 | Issue Date: | 10-Apr-2008 | Publisher: | International Union of Crystallography | Project: | POCI/FIS/57876/2004 | Serial title, monograph or event: | Acta Crystallographica Section E: Structure Reports Online | Volume: | 64 | Issue: | Pt 5 | Abstract: | The title compound, C(10)H(6)O(8)·2C(3)H(7)NO(2), crystallizes as an adduct with the acid and amino acid mol-ecules in their neutral forms. The asymmetric unit contains one half of a centrosymmetric pyromellitic acid mol-ecule and one sarcosine mol-ecule. The sarcosine has the amine group protonated and the carboxyl group deprotonated, as is usual for amino acids (zwitterionic form). The pyromellitic acid mol-ecules retain the four carboxyl H atoms with the carboxyl groups rotated out of the ring plane [O-C-C-C torsion angles = 24.1 (3) and 61.6 (2)°]. There is a three-dimensional hydrogen-bond network linking the mol-ecules. | URI: | https://hdl.handle.net/10316/110434 | ISSN: | 1600-5368 | DOI: | 10.1107/S1600536808009045 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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