Abstract
The asymmetric unit of the title compound, [Ni(NCS)2(C5H4ClN)2(H2O)2], consists of one nickel(II) cation that is located on a center of inversion and one thio-cyanate anion, one water mol-ecule and one 2-chloro-pyridine ligand all occupying general positions. The NiII cation is octa-hedrally coordinated by two terminal N-bound thio-cyanato ligands, two aqua ligands and two N-bound 2-chloro-pyridine ligands into discrete complexes. Individual complexes are linked by inter-molecular O-H⋯S and O-H⋯Cl hydrogen-bonding inter-actions into a layered network extending parallel to the bc plane. Weak inter-actions of types C-H⋯S and C-H⋯Cl consolidate the crystal packing.
Highlights
The asymmetric unit of the title compound, [Ni(NCS)2(C5H4ClN)2(H2O)2], consists of one nickel(II) cation that is located on a center of inversion and one thiocyanate anion, one water molecule and one 2-chloropyridine ligand all occupying general positions
The NiII cation is octahedrally coordinated by two terminal N-bound thiocyanato ligands, two aqua ligands and two N-bound 2chloropyridine ligands into discrete complexes
Dependent on the metal cation and the neutral co-ligand, they show different magnetic phenomena including a slow relaxation of the magnetization, which is indicative for single-chain magnetism (Werner et al, 2014, 2015a,b,c)
Summary
The synthesis of materials with interesting cooperative magnetic properties is still a major field in coordination chemistry (Zhang et al, 2011). One feasible strategy for the preparation of such compounds is to link paramagnetic cations with small anionic ligands such as, for example, thiocyanate anions to enable a magnetic exchange between the cations (Palion-Gazda et al, 2015; Massoud et al, 2013). In this regard, our group has reported on a number of coordination polymers with bridging thiocyanato ligands. In view of our systematic studies, we became interested into compounds based on 2-chloropyridine as co-ligand, for which only two different polymorphs were found for representatives containing Zn or Co (Wöhlert et al, 2013). No single-phase crystalline powder could be synthesized, which prevented further investigations of its physical properties
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