Synthesis, structures, spectroscopy, and magnetic properties of pyrazineBridged two-dimensional complexes {Ni(pyz)_2(OCN) _2}_n and {Ni(pyz)_2(SCN)_2}_n

摘要

The two complexes {Ni(pyz)_2(OCN)_2}_n (1) and {Ni(pyz)_2(SCN)_2}_n (2) (pyz = pyrazine) were synthesized by diffusion of metal ion and ligand solutions through a buffer solution in U-shaped tubes. Single-crystals were obtained and characterized by infrared spectroscopy, X-ray diffraction, and magnetic susceptibility measure-ments. Both compounds have 2D sheet structures. Either the cyanate or the thiocyanate group connects to the metal atoms as terminal. ligand. The magnetic susceptibility was analyzed and a weak antiferromagnetic interaction is propagated by the bridging pyrazine ligands.