Synthesis, structure and properties of [Co(NCS)₂(4-(4-chlorobenzyl)pyridine)₂]_n, that shows slow magnetic relaxations and a metamagnetic transition

Abstract

The reaction of Co(NCS)2 with 4-(4-chlorobenzyl)pyridine (ClBP) leads to the formation of Co(NCS)2(4-(4-chlorobenzyl)pyridine)4 () and [Co(NCS)2(4-(4-chlorobenzyl)pyridine)2]n (). In the crystal structure of the Co(ii) cations are octahedrally coordinated by two terminal bonded thiocyanato anions and four ClBP ligands, whereas in the Co(ii) cations are linked into chains by pairs of μ-1,3-bridging thiocyanato anions. Magnetic measurements of show an antiferromagnetic phase transition with TN = 3.9 K. A metamagnetic transition is observed at the critical magnetic field of 260 Oe. Magnetic relaxations in the zero field are consistent with single chain magnetic behavior. These results are compared with those obtained for similar compounds reported recently.

Steric Effects of Alkyl Substituents at N-Donor Bidentate Amines Direct the Nuclearity, Bonding and Bridging Modes in Isothiocyanato-Copper(II) Coordination Compounds

“…Pseudohalides are a class of compounds that are able to simultaneously bind two or more metal ions leading to the formation of di-or poly-nuclear coordination compounds of different nuclearity and clusters, and coordination polymers (CPs) of different dimensionality (1D, 2D, 3D) and topology [1][2][3][4][5][6][7][8][9][10]. However, the formation of these compounds depends largely on a number of factors which include the electronic nature and oxidation state of the metal ion, the nature of the coordinated ancillary co-ligand(s), its skeletal structure, and the steric hindrance imposed by the blocking co-ligand(s) surrounding the central metal ion [11,12].…”

Synthesis, Structures, and Physical Properties of Thiocyanate Coordination Compounds with 3‐Hydroxymethylpyridine

“…[35][36][37][38][39][40][41] Unfortunately, these metal cations are not very chalcophilic and therefore, the bridging compounds are frequently difficult to obtain. In some cases, they can be synthesized from solution using an excess of the metal thiocyanate but there are many examples in which such compounds cannot be obtained as phase pure samples or are not accessible from solution.…”

Crystal structure of bis(pyridine-4-carbothioamide-κN1)bis(thiocyanato-κN)cobalt(II) methanol monosolvate

“…To study the influence of the neutral co-ligand on the magnetic properties, different pyridine derivatives substituted in the 4-position, e.g. 4-benzoylpyridine, 4-vinylpyridine, 4-(4-chlorobenzyl)pyridine and 4-(3-phenylpropyl)pyridine have been investigated (Rams et al, 2017b;Werner et al, 2014Werner et al, , 2015. In this regard, we also became interested in pyridine-4-carbothioamide as a ligand, because in this case the Co(NCS) 2 chains can be linked into layers by pairs of intermolecular hydrogen bonds between the amino H atoms and the thioamide S atom.…”