Received 14 December 2012
aDepartment of Studies and Research in Chemistry, Tumkur University, Tumkur, Karnataka 572 103, India,bCentre of Advanced Study in Crystallography and Biophysics, University of Madras Guindy Campus, Chennai 600 025, India,cDepartment of Studies and Research in Chemistry, U.C.S, Tumkur University, Tumkur, Karnataka 572 103, India, and dDepartment of Studies and Research in Physics, U.C.S., Tumkur University, Tumkur, Karnataka 572 103, India
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The title compound, C10H16N4, crystalizes with two molecules (A and B) in the asymmetric unit in which the dihedral angles between the piperidine and pyrimidine rings are 47.5 (1) and 10.3 (1)°. The four C atoms of the pyrimidine ring in one of the molecules are disordered over two sets of sites with occupancy factors 0.508 (11):0.492 (11). In the crystal, the A molecules are linked to one another through N-HN hydrogen bonds, generating R22(8) ring patterns and forming inversion dimers. These dimers are further connected on either side to a B molecule through pairs of N-HN hydrogen bonds, resulting in a tetrameric unit.
For background to pyrimidine derivatives and their biological activity, see: Patel et al. (2003) and for a related structure see: Sreenivasa et al. (2012). For hydrogen bond motifs, see: Bernstein et al. (1995).
Data collection: APEX2 (Bruker, 2004); cell refinement: APEX2 and SAINT-Plus (Bruker, 2004); data reduction: SAINT-Plus and XPREP (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 2012); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: SJ5288 ).
The authors thank Dr S. C. Sharma, Vice Chancellor, Tumkur University, for his constant encouragement. BSP thanks Dr H. C. Devarajegowda, Department of Physics, Yuvarajas College (constituent), University of Mysore, for his support and guidence.
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