2-Amino-6-(piperidin-1-yl)-4-p-tolyl-pyridine-3,5-dicarbo-nitrile

Abstract

In the title compound, C19H19N5, the piperidine ring adopts a chair conformation. The pyridine ring is essentially planar, with a maximum deviation of 0.039 (2) Å for a C atom substituted with a carbonitrile group. The mean plane of the central pyridine ring makes the dihedral angles of 37.90 (14) and 56.10 (12)° with the piperidine and benzene rings, respectively. In the crystal, mol-ecules are linked via N-H⋯N and C-H⋯N hydrogen bonds, forming chains along [101], and enclosing R 2 (2)(17) ring motifs. The chains are linked by further C-H⋯N hydrogen bonds, forming two-dimensional networks lying parallel to (10-1), and enclosing inversion dimers with R 2 (2)(20) ring motifs.

Fig. 1.

A view of the molecular structure, showing the atom numbering scheme. Displacement ellipsoids are drawn at the 30% probability level. H atoms are presented as a small spheres of arbitrary radius.

Fig. 2.

The packing structure of the title compound shows two intermolecular C—H···N and N—H···N hydrogen bond to generate R22(17) motif. H atoms have been omited for clarity.

Fig. 3.

The packing structure of the title compound shows another pair of intermolecular C—H···N hydrogen bonds to form inversion dimer. H atoms have been omited for clarity.