SYNTHESIS, CRYSTAL STRUCTURE, AND MAGNETIC PROPERTIES OF BINUCLEAR COBALT(II) COMPLEX WITH 2-(5-{6-[5-(PYRAZIN-2-YL)-lH-l,2,4-TRIAZOL-3-YL]- PYRIDIN-2-YL}-lH-l,2,4-TRIAZOL-3-YL)PYRAZINE

摘要

The synthesis and crystal structure of a new Co(Il) compound with 2-(5-{6-[5-(pyrazin-2-yl)-l H-1,2,4-triazoi-3-yl]-pyridin-2-yl}-1H-1,2,4-triazol-3-yl)pyrazine (H_2Ptptp) are reported. The new compound [Co_2(Ptptp)Cl_2(H_20)_2] ? H_20 (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_20 molecules and one lattice H_20 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.