Two new salts based on bis(1,2,5-thiadiazole-3,4-dithiolate)nickelate anion with substituted benzyl 4-ethylpyridinium: Syntheses, crystal structures and properties

摘要

Two new salts based on [Ni(tdas) _2] ~(2-) (tdas ~(2-) = 1,2,5-thiadiazole-3,4-dithiolate) anion, [Bz4EtPy] _2[Ni(tdas) _2] (1) and [4ClBz4EtPy] _2[Ni(tdas) _2] (2), have been prepared by reaction of Na _2tdas, NiCl _2·6H _2O, and [Bz4EtPy]Br ([Bz4EtPy] ~+ = 1-benzyl-4-ethylpyridinium)or [4ClBz4EtPy] Br ([4ClBz4EtPy] ~+ = 1-(4'-chlorobenzyl)-4-ethylpyridmium), and characterized by elemental analyses, UV, IR, MS spectrum, molar conductivity and single crystal X-ray diffraction. Single-crystal X-ray diffraction analyses indicate that the two salts crystallize in a triclinic system with space group P- 1. The unit cell contains two [Bz4EtPy] ~+/[4ClBz4EtPy] ~+ and one [Ni(tdas) _2] ~(2-) anion in which the anion exhibits a quasiplanar structure. The crystals of 1 and 2 are stabilized through C-H...S and C-H...Ni hydrogen bonds, π...π stacking interactions and S...Cl short interactions.