Crystal structure and magnetic properties of a hybrid compound: Disubstituted benzyl dimethylaminopyridinium bis(maleonitriledithiolate)cuprate(II).

Hybrid compound 1-(2-fluro-4-bromobenzyl)-4-dimethylaminopyridium bis(maleonitriledithiolate) cuprate(II) [2F4BrBzDMAP]2[Cu(mnt)2] is prepared and characterized by X-ray diffraction. The compound crystallizes in the triclinic system with the space group <italic>P</italic>-1. The unit cell dimensions are <italic>a</italic> = 8.9813(11), <italic>b</italic> = 9.0794(12), <italic>c</italic> = 13.1082(17) Å and α = 88.179(2)°, β = 81.397(2)°, γ = 70.736(1)° with <italic>Z</italic> = 1. The structure consists of two [2F4BrBzDMAP]+ cations and one [Cu(mnt)2]2- anion. The cations of the title compound stack into a one-dimensional column through p∙∙∙π and π∙∙∙π interactions, and the anions (A) and cations (C) are arranged alternatively into one 1D column in an ∙∙∙A-CC-A-CC-A∙∙∙ sequence through C-H∙∙∙N hydrogen bonds and S∙∙∙N interactions. The presence of functional groups is confirmed by the FT-IR spectrum, and optical absorption is ascertained by the recorded UV-Visible spectrum. The thermal stability of the compound is determined by thermogravimetric and differential thermal analyses. The variable-temperature magnetic susceptibility measurement shows that the compound exhibits a weak ferromagnetic coupling behavior when the temperature is lowered. [ABSTRACT FROM AUTHOR]