3-(4,6-Dichloro-1,3,5-triazin-2-yl)-2,2-dimethyl-1,3-oxazolidine

In the title compound, C₈H₁₀Cl₂N₄O, the dichloro-substituted triazine ring and the quasi-plane of the five-membered dimethyl-substituted oxazolidine unit, in which the O atom lies 0.228 (1) Å out of the least-squares plane, are close to being coplanar [dihedral angle = 4.99 (10)°]. In the crystal, mol­ecules are linked by inter­molecular C—H...Cl inter­actions, forming chains extend along the a axis. Also present are weak π–π inter­actions between triazine rings [minimum ring centroid separation = 3.7427 (11) Å].

3,5-Dimethyl­pyrazolium 3,5-dinitro­salicylate

In the title mol­ecular salt, C₅H₉N₂⁺·C₇H₃N₂O₇⁻, the roughly planar anion (r.m.s. deviation = 0.120 Å) has been deprotonated at the phenol group. An intra­molecular O—H...O hydrogen bond in the anion generates an S(6) ring. In the crystal, the components are linked by cation-to-anion N—H...O and N—H...(O,O) hydrogen bonds, generating [010] double chains. Weak C—H...O inter­actions consolidate the packing.