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

摘要

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 P-1. The unit cell dimensions are a = 8.9813(11), b = 9.0794(12), c = 13.1082(17) and alpha = 88.179(2)A degrees, beta = 81.397(2)A degrees, gamma = 70.736(1)A degrees with Z = 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 pa (TM) a (TM) a (TM)pi and pi a (TM) a (TM) a (TM)pi interactions, and the anions (A) and cations (C) are arranged alternatively into one 1D column in an a (TM) a (TM) a (TM) A-CC-A-CC-Aa (TM) a (TM) a (TM) sequence through C-Ha (TM) a (TM) a (TM) N hydrogen bonds and Sa (TM) a (TM) a (TM) 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.