Synthesis, crystal structure and magnetism of a two-dimensional Ni(II) coordination polymer with thiocyanate anion and dehydrogen-1,10-phenanthrolin-2-ol as bridging ligands

Abstract

A two-dimensional coordination polymer [Ni( 1,3 -SCN)(-Pheno)(CH 3 OH)] n (where Pheno ¼ dehydrogen-1,10-phenanthrolin-2-ol) has been synthesized and its crystal structure determined by X-ray crystallography. Adjacent Ni(II) ions are coordinated by 1,3 -SCN À and -Pheno alternately forming a two-dimensional sheet structure. The fitting of the variabletemperature magnetic susceptibilities with a binuclear nickel(II) formula reveals that there is an anti-ferromagnetic interaction between the bridging Ni(II) ions with the magnetic coupling constant 2J ¼ À0.67 cm À1 .

Synthesis, crystal structure, and magnetic properties of a new end-to-end thiocyanato-bridged dicobalt(II) complex CoII(dien)(H2O)(NCS)(μ1,3-NCS)CoII(dien)(NCS)2 (dien = diethylenetriamine)

“…At 300-40 K M T value increases gradually, then sharply increases without a maximum value until 5 K (6.37 cm 3 K mol À1 ), indicating the onset of ferromagnetic interaction within the dinuclear complex. A dinuclear cobalt, with the consideration of other factors (such as intermolecular interactions, ZFS-zero field splitting), is used to simulate M T versus T and M versus T plots, leading to g ¼ 2.15, J ¼ þ 1.14 cm À1 , ¼ þ 0.35 K, TIP ¼ 300 Â 10 À6 cm 3 mol À1 , where J, g, , and TIP are intramolecular magnetic coupling parameter, Zeeman factor, other factors, and temperature-independent paramagnetism, respectively [20]. It is clear that this simulation gives evidence for ferromagnetic interactions between Co1 and Co2.…”