Abstract
Two new tetrachlorocuprate(II) salts, [BzDMAP]2[CuCl4](1) and [4FBzDMAP]2[CuCl4](2) ([BzDMAP]+ = 1-benzyl-4-dimethylaminopyridinium; [4FBzDMAP]+ = 1-(4′-fluorobenzyl)-4-dimethylaminopyridinium), have been prepared and characterized by elemental analysis, IR, MS, single-crystal X-ray diffraction and magnetic susceptibility. Compound 1 crystallizes in the monoclinic system with space group P21/n, while 2 crystallizes in the orthorhombic system with space group P212121. These two salts comprise one [CuCl4]2– anion and two cations, and the [CuCl4]2– anions exhibit distorted tetrahedral coordination geometry. The C˭H···Cl, C˭H···π hydrogen bonds and π···π stacking interactions in the crystal play important roles in the stacking and stabilization of the two salts, and give rise to a 3D network structure. Magnetic susceptibility measurements in the temperature range of 2–300 K show that both 1 and 2 exhibit a ferromagnetic coupling behavior.
Acknowledgments
The authors thank the Science and Technology Project (No. 2008B080701002.2011B080701026) from Guangdong Science and Technology Department and the key Academic Program of the third phase “211 Project” of South China Agricultural University (No. 2009B010100001) for financial support of this work.