کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1306167 | 975069 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Syntheses, crystal structures, weak interactions and magnetic properties of two salts with tetrachlorocuprate(II) and substituted benzylpyridinium Syntheses, crystal structures, weak interactions and magnetic properties of two salts with tetrachlorocuprate(II) and substituted benzylpyridinium](/preview/png/1306167.png)
Two tetrachlorocuprate(II) salts, [4-RBzPy]2CuCl4 ([4-RBzPy]+ = 4-R-benzylpyridinium, R = Cl(1), NO2(2)), have been prepared and characterized by elemental analysis, IR, MS, single-crystal X-ray diffraction and magnetic susceptibility. Compound 1 crystallizes in the orthorhombic system with space group Pca21, while 2 in the monoclinic P21/c. Two salts comprise a tetrahedral [CuCl4]2− anion and two flexuous [4-RBzPy]+ cations. The cations both 1 and 2 form a column through p⋯π and π⋯π interactions, while the [CuCl4]2− anions only in 2 form a dimer through Cl⋯Cl interaction. The C–H⋯Cl and C–H⋯Cu weak hydrogen bonds between the anions and the cations give further rise to a 3D network structure. Magnetic susceptibility measurements in the temperature range 2–300 K show that 1 exhibits a ferromagnetic coupling behavior with θ = 3.57 K, while 2 shows an antiferromagnetism with J = −11.09 cm−1.
Two new salts, [4-ClBzPy]2[CuCl4](1) and ([4-NO2BzPy]2[CuCl4](2) ([BzPy]+ = benzylpyridinium), have been investigated. The cations both 1 and 2 form a column, while the [CuCl4]2− anions only in 2 form a dimer; and 1 exhibits a ferromagnetic coupling behavior, while 2 shows an antiferromagnetism.Figure optionsDownload as PowerPoint slideHighlights
► Two tetrachlorocuprate(II) salts have been obtained.
► The substituent of the cation affects the stacking mode of the anions.
► The anions of 2 form a dimer through Cl⋯Cl interaction.
► 1 Exhibits a ferromagnetic coupling behavior with θ = 3.57 K.
► 2 Shows an antiferromagnetism with J = −11.09 cm−1.
Journal: Inorganica Chimica Acta - Volume 379, Issue 1, 15 December 2011, Pages 140–144