2-{[(2-Methyl­prop-2-en-1-yl)­oxy]meth­yl}-6-phenyl-2,3,4,5-tetra­hydro-1,2,4-triazine-3,5-dione

The 1,2,4-triazine ring in the title compound, C₁₄H₁₅N₃O₃, is approximately planar (r.m.s. deviation = 0.019 Å); the C atom at the 6-position deviates by 0.026 (2) Å from the mean plane whereas the C atom at the 2-position deviates by 0.166 (4) Å in the opposite direction. The triazine ring is oriented at 8.60 (13)° with respect to the phenyl ring. The imino group is hydrogen-bond donor to the exocyclic O atom at the 3-position of an adjacent mol­ecule, the hydrogen bond generating an inversion dimer.

6-(2-Methyl­prop­yl)-4-oxo-2-sulfanyl­idene-1,2,3,4-tetra­hydro­pyrimidine-5-carbonitrile

The title thio­uracil derivative, C₉H₁₁N₃OS, exists in the thione form. The six atoms comprising the ring are almost coplanar [r.m.s. deviation = 0.015 Å] and the 2-methyl­propyl group lies approximately perpendicular to this plane [the N—C—C—C torsion angle is 72.88 (14)°]. Linear supra­molecular chains along [001] sustained by N—H...O and N—H...S hydrogen bonding feature in the crystal packing.

2-[(4-Chloro­benz­yl)sulfan­yl]-4-(2-methyl­prop­yl)-6-(phenyl­sulfan­yl)pyrimidine-5-carbonitrile

In the title compound, C₂₂H₂₀ClN₃S₂, the S-bound benzene rings are inclined [dihedral angles = 78.13 (10) and 36.70 (9)°] with respect to the pyrimidine ring. The methyl­propyl group occupies a position normal to the pyrimidine ring [N—C—C—C torsion angle = 92.3 (2)°]. In the crystal, supra­molecular layers are formed in the bc plane, being consolidated by C—H...π and π—π inter­actions, the latter between the pyrimidine and S-bound benzene rings [inter-centroid distance = 3.7683 (12) Å].