Synthesis, Crystal Structure, and Magnetic Property of Copper(II) Complex With Xanthene-9-Carboxylate and 3-(2-Pyridyl) Pyrazole Ligands

One Cu-II complex, [Cu-2(L)(pp)(2)(CH3OH)(ClO4)(0.5)](2)(ClO4)center dot H2O (1), with mixed xanthene-9-carboxylate (L) and 3-(2-pyridyl)pyrazole (Hpp) ligands, was synthesized and characterized by single-crystal X-ray diffraction analysis. Complex 1 has a tetranuclear gridlike structure, which is further interlinked via intermolecular O-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen-bonding and pi center dot center dot center dot pi interactions to generate a 3-D supramolecular framework. The magnetic property of 1 was investigated, which exhibits strong antiferromagnetic interaction. The best agreement between simulated and experimental data was obtained for J(1) = 275cm(-1), J(2) = 150cm(-1), and g = 2.27.