Received 16 December 2011
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia,bMedicinal Chemistry Division, Department of Chemistry, National Institute of Technology-Karnataka, Surathkal, Mangalore 575 025, India, and cSchulich Faculty of Chemistry, Technion Israel Institute of Technology, Haifa-Israel
Correspondence e-mail: firstname.lastname@example.org
Two molecules make up the asymmetric unit of the title compound, C12H18N4O2, and both feature an intramolecular O-HN hydrogen bond, which generates an S(6) ring. The diethylamino group of one of the molecules is disordered over two sets of sites in a 0.59 (2):0.41 (2) ratio. In the crystal, N-HO hydrogen bonds link the molecules into sheets lying parallel to the ac plane and C-H interactions are also observed.
For a related structure and background references to semicarbazides and semicarbazones, see: Fun et al. (2011). For hydrogen-bond motifs, see: Bernstein et al. (1995). For reference bond-length data, see: Allen et al. (1987).
Data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HB6571 ).
HKF and CWO thank Universiti Sains Malaysia (USM) for the Research University Grant (1001/PFIZIK/811160). CWO also thanks the Malaysian Government and USM for the award of the post of research assistant under the Research University Grant (1001/PFIZIK/811151). AMI is thankful to the Department of Atomic Energy, Board for Research in Nuclear Sciences, Government of India, for the Young Scientist award.
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