Bis(2,4-dimethyl­pyridinium) tetra­bromido­mercurate(II)

The asymmetric unit of the title compound, (C₇H₁₀N)₂[HgBr₄], consists of one cation and one half-anion, bis­ected by a twofold rotation axis passing through the metal atom. The anion exhibits a distorted tetra­hedral arrangement about the Hg^II atom. In the crystal, the cations and anions are linked by N—H...Br hydrogen-bonding inter­actions along [010]. Cation–cation π–π stacking and Br...Br inter­molecular inter­actions are absent.

Bis{(E)-3-[(2-hy­droxy­benzyl­idene)amino]­prop­yl}ammonium chloride

The title salt, C₂₀H₂₆N₃O₂⁺·Cl⁻, lies across a twofold crystallographic axis with the central N atom of the cation and the chloride anion sitting on this axis, Z′ = 0.5. There is an intra­molecular hydrogen bond between the hy­droxy H atom and the imino N atom. The chloride anion and the cation are connected into chains along the a axis by an N—H...Cl hydrogen bond. In the crystal, the chains are linked via C—H...Cl interactions forming two-dimensional networks lying parallel to (101).