1,4-Bis(imidazol-1-ylmeth­yl)naphthalene

In the title compound, C₁₈H₁₆N₄, the two imidazole rings are twisted away from the central naphthalene ring system by 81.4 (1) and 88.4 (1)°. The crystal packing is stabilized by C—H...N hydrogen bonds

3,3′-(1,4-Naphthalene­dimethyl­ene)bis­(1-methyl­imidazolium) diiodide monohydrate

In the title compound, C₂₀H₂₂N₄²⁺·2I⁻·H₂O, the two imidazolium rings are twisted away from the central naphthalene plane by 76.6 (1) and 74.5 (1)°. The crystal packing is stabilized by O—H...I, C—H...O and C—H...I hydrogen bonds.

Dimethyl naphthalene-1,4-dicarboxyl­ate

In the title compound, C₁₄H₁₂O₄, the two ester groups are twisted away from the attached ring by 25.3 (3) and 14.6 (3)°. The crystal packing is stabilized by C—H...O hydrogen bonds.