Synthesis, crystal structure, and magnetic properties of binuclear cobalt(II) complex with 2-(5-{6-[5-(pyrazin-2-yl)-1H-1,2,4-triazol-3-yl]-pyridin-2-yl}-1H-1,2,4-triazol-3-yl)pyrazine

The synthesis and crystal structure of a new Co(II) compound with 2-(5-{6-[5-(pyrazin-2-yl)-1 H -1,2,4-triazol-3-yl]-pyridin-2-yl}-1 H -1,2,4-triazol-3-yl)pyrazine (H 2 Ptptp) are reported. The new compound [Co 2 (Ptptp)Cl 2 (H 2 O) 2 ] · H 2 O ( I ) has been determined by single-crystal X-ray diffraction (CIF file CCDC no. 1010785) and characterized by elemental analyses and infrared spectrum. The structure I consists of two independent Co 2+ ions, one Ptptp 2− anion, two Cl − anions, two coordinated H 2 O molecules and one lattice H 2 O molecule. The three-dimensional (3D) supramolecular architecture is formed through the hydrogen bonds among adjacent units. Moreover, magnetic susceptibility measurements indicate that the compound exhibits weak antiferromagnetic coupling interaction.