Received 12 December 2011
aMolecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, PO Wits 2050, South Africa,bFaculty of Science, NYU Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates, and cInstitute of Mineralogy and Petrography, University of Innsbruck, Innsbruck 6020, Austria
Correspondence e-mail: email@example.com
The crystal structure of the title co-crystal, 2C6H7N3O·C6H10O4, is a second polymorph, designated form II, of the co-crystal formed between the two molecules [Lemmerer et al. (2011). CrystEngComm, 13, 55-59]. The asymmetric unit comprises one molecule of nicotinic acid hydrazide, and one half-molecule of adipic acid (the entire molecule is completed by the application of a centre of inversion). In the crystal, molecules assemble into a three-dimensional network of hydrogen bonds, formed by three N-HO hydrogen bonds and one O-HN hydrogen bond. The O-HN hydrogen bond formed between the carboxyl group and the pyridine ring is supported by a C-HO hydrogen bond.
For the first polymorph, see: Lemmerer et al. (2011). For experimental techniques, see: Friscic et al. (2009); Skovsgaard & Bond (2009); Karki et al. (2009). For hydrogen-bonding motifs, see: Bernstein et al. (1995).
Data collection: CrysAlis PRO (Oxford Diffraction, 2006); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 1999); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON (Spek, 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: TK5035 ).
This work was supported in part by grant No. 2004118 from the United States-Israel Binational Science Foundation (Jerusalem). AL thanks the South African National Research Foundation for a postdoctoral scholarship (SFP2007070400002) and the Oppenheimer Memorial Trust for financial support, and the Molecular Sciences Institute for infrastucture.
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