Add time:09/25/2019 Source:sciencedirect.com
Three cobalt(II) isothiocyanato complexes with 4-methoxypyridine (4-MOP) as a co-ligand have been synthesized: catena-[Co(4-MOP)2(μ1,3-NCS)2] (1), trans-[Co(4-MOP)4(NCS)2] (2), and [Co(4-MOP)2(NCS)2] (3) and structurally characterized by IR, UV–Vis spectroscopy and single crystal X-ray diffraction. The complexes 2 and 3 are discrete monomeric species with octahedral and tetrahedral geometries, respectively whereas the catena-[Co(4-MOP)2(μ1,3-NCS)2] (1) is featuring a polymeric 1D system with doubly bridging NCS− groups through the terminals N- and S-donor atoms in a trans octahedral geometry. The thermoanalytical behavior of 1–3 is reported. Magnetic susceptibility of the bridged-isothiocyanato coordination polymer 1 was studied down to a temperature of 2 K and at various magnetic dc and ac fields. These measurements indicate a metamagnetic transition in 1.
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