Acta Cryst. (2011). E67, o41  [ doi:10.1107/S1600536810050063 ]

2,6-Bis(2-methyl-1,3-diazinan-2-yl)pyridine

Q.-C. Ton and M. Bolte

Abstract: The title compound, C₁₅H₂₅N₅, is an aminalization product between 2,6-diacetylpyridine and 1,3-diaminopropane. It crystallizes with two independent molecules in the asymmetric unit with different conformations. In the first molecule, the methyl groups are cis oriented with respect to the pyridine ring [N-C-C-C torsion angles = 72.5 (1) and 80.3 (1)°], while they are trans oriented in the second molecule [N-C-C-C torsion angles = 82.6 (1) and -90.8 (1)°]. Each of the two molecules forms centrosymmetric dimers held together by N-HN hydrogen bonds, thus forming R₂²(16) rings. The two dimers are interlinked by additional N-HN bonds into R₄⁴(14) rings, building chains along the a axis. These patterns influence the orientation (either equatorial or axial) of the N-H bonds.

Online 8 December 2010

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