(2E)-N-(3,5-Dibromo-4-methoxy­phen­yl)-2-(hydroxy­imino)acetamide

The title compound, C₉H₈Br₂N₂O₃, is planar (r.m.s. deviation = 0.030 Å) with the exception of the terminal methyl group which lies out of the plane [1.219 (3) Å]. The conformation about the C=N double bond [1.268 (3) Å] is E. An intra­molecular N—H...N hydrogen bond occurs. Linear supra­molecular chains along the b axis mediated by O—H...O hydrogen-bonding inter­actions feature in the crystal structure. These chains are also stabilized by weak C—H...N contacts.

1,3-Bis(4-bromo­phen­yl)imidazolium chloride dihydrate

In the title hydrated salt, C₁₅H₁₁Br₂N₂⁺·Cl⁻·2H₂O, the complete imidazolium cation is generated by a crystallographic twofold axis, with one C atom lying on the axis. The chloride ion and both water mol­ecules of crystallization also lie on a crystallographic twofold axis of symmetry. The cation is non-planar, the dihedral angle formed between the central imidazolium and benzene rings being 12.9 (3)°; the dihedral angle between the symmetry-related benzene rings is 25.60 (13)°. In the crystal, O—H...Cl hydrogen bonds result in supra­molecular chains along c mediated by eight-membered {...HOH...Cl}₂ synthons. These are consolidated by C—H...O and π–π [centroid–centroid distance = 3.687 (3) Å] inter­actions.