(E)-4-[(1-Benzyl-4-benzyl­idene-2,5-di­oxopyrrolidin-3-yl)meth­yl]benzalde­hyde 0.25-hydrate

The crystal structure of the title compound, C₂₆H₂₁NO₃·0.25H₂O, reveals one stereogenic centre in the mol­ecule. Nevertheless, due to the observed centrosymmetric space group, both enanti­omers are present in the crystal packing. The water molecule of crystallisation is located on a crystallographic inversion center. The mol­ecule contains one five-membered ring (A) and three six-membered rings (benzyl ring B, benzyl­idene ring C and formyl­benzyl ring D). All four rings are not coplanar: the dihedral angles between rings A and B, A and C, and A and D are 70.35 (9), 33.8 (1) and 60.30 (9)°, respectively. In the crystal, pairs of weak C—H...O inter­actions lead to the formation of centrosymmetric dimers. Additional C—H...O inter­actions link the dimers into chains along [011].

1-{(1Z)-1-[3-(2,4-Dichloro­phen­oxy)prop­oxy]-1-(2,4-difluoro­phen­yl)prop-1-en-2-yl}-1H-1,2,4-triazole

In the title compound, C₂₀H₁₇Cl₂F₂N₃O₂, the triazole ring makes dihedral angles of 28.0 (3) and 72.5 (2)° with the 2,4-dichloro­pheny and 2,4-difluoro­phenyl rings, respectively, and the mol­ecule adopts a Z-conformation about the C=C double bond. In the crystal, C—H...O and C—H...N hydrogen bonds link the mol­ecules.

1-{(Z)-1-[3-(4-Bromo­phen­oxy)prop­oxy]-1-(2,4-difluoro­phen­yl)prop-1-en-2-yl}-1H-1,2,4-triazol-4-ium nitrate

In the title mol­ecular salt, C₂₀H₁₉BrF₂N₃O₂⁺·NO₃⁻, the N atom at position 4 of the heterocyclic ring is protonated. The triazole ring makes dihedral angles of 96.6 (4) and 54.4 (3)° with the 4-bromo­phenyl and 2,4-difluoro­phenyl rings, respectively, and the mol­ecule adopts a Z conformation about the C=C double bond. In the crystal, cations and anions are linked by N—H...O and C—H...O hydrogen bonds.