1-(2-Amino-6-methyl­pyrimidin-4-yl)-N,N-dimethyl­piperidin-4-aminium chloride

In the title mol­ecular salt, C₁₂H₂₂N₅⁺·Cl⁻, the cation is protonated at the dimethyl-substituted tertiary N atom. The piperidine ring adopts a chair conformation with the exocyclic N—C bond in an equatorial orientation. The dihedral angle between the piperidine ring (all atoms) and the pyrimidine ring is 14.00 (1)°. In the crystal, the ions are connected by N—H...N hydrogen bonds, forming inversion dimers, which are further connected by N—H...Cl hydrogen bonds. Aromatic π–π stacking inter­actions [centroid–centroid separation = 3.4790 (9) Å] are also observed in the structure.

(E)-3-Chloro-N′-hy­droxy­benzene-1-carboximidamide

The title compound, C₇H₇ClN₂O, crystallizes with two independent mol­ecules in the asymmetric unit. The compound adopts an E configuration across the C=N double bond, as the –OH group and the benzene ring are on opposite sides of the double bond while the H atom of the hy­droxy group is directed away from the –NH₂ group. In the crystal, mol­ecules are linked to one another through O—H...N and N—H...O hydrogen bonds, forming chains along [010].

4-Methyl-2,6-bis­(pyrrolidin-1-yl)pyrimidine

In the crystal of the title compound, C₁₃H₂₀N₄, the mol­ecule is nearly planar, the dihedral angles between the pyrimidine and the two pyrrolidine rings being 4.71 (2) and 4.50 (2)°. The crystal features inversion-related dimers linked by pairs of C—H...N hydrogen bonds generating R₂²(16) patterns. The dimeric units are further linked into C(6) chains via an additional C—H...N hydrogen bond.