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

• Main Authors: Michael Bolte, Quoc-Cuong Ton
• Format: Article
• Language: English
• Published: International Union of Crystallography 2011-01-01
• Series: Acta Crystallographica Section E
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S1600536810050063

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—H...N hydrogen bonds, thus forming R22(16) rings. The two dimers are interlinked by additional N—H...N 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.