Abstract
The asymmetric unit of the title compound, [Co(NCS)2(C6H6N2O)4]·2C6H6N2O·C2H5OH, comprises one Co(II) cation, two thio-cyanate anions, four coordinating and two solvent isonicotinamide molecules and one ethanol solvent mol-ecule. The Co(II) cations are octa-hedrally coordinated by four N-coordinating isonicotinamide ligands and two terminally N-bonded thio-cyanate anions. These discrete complexes are linked by inter-molecular N-H⋯O and N-H⋯S hydrogen-bonding inter-actions into a three-dimensional network. The two isonicotinamide and the ethanol solvent mol-ecules are embedded in channels of this network and are linked through further N-H⋯O and N-H⋯N hydrogen bonds to the network. The ethanol solvent mol-ecule is disordered over two sets of sites (occupancy ratio 0.6:0.4).
Highlights
The asymmetric unit of the title compound, [Co(NCS)2(C6H6N2O)4]2C6H6N2OC2H5OH, comprises one CoII cation, two thiocyanate anions, four coordinating and two solvent isonicotinamide molecules and one ethanol solvent molecule
There is an increasing interest in compounds showing cooperative magnetic properties, such as ferromagnetism, antiferromagnetism and metamagnetism or a slow relaxation of the magnetization, indicative of single-molecule or singlechain magnetism (Gao et al, 2009; Ma et al, 2009; PalionGazda et al, 2015; Näther et al, 2013). In this context we have reported on a number of one-dimensional cobalt(II) thiocyanate coordination compounds with different N-donor coligands that show slow relaxations of the magnetization which in some compounds can be traced back to the behaviour of single-chain magnets (SCM) (Wöhlert et al, 2014; Werner et al, 2014, 2015a,b,c,)
Intermolecular N—H O hydrogen-bonding interactions (Fig. 2, Table 1). These chains are further linked into a threedimensional network by interchain N—H S hydrogen bonding between the thiocyanate anions and the amide H
Summary
There is an increasing interest in compounds showing cooperative magnetic properties, such as ferromagnetism, antiferromagnetism and metamagnetism or a slow relaxation of the magnetization, indicative of single-molecule or singlechain magnetism (Gao et al, 2009; Ma et al, 2009; PalionGazda et al, 2015; Näther et al, 2013). In the course of our systematic investigation of these materials, we became interested in the monodentate ligand isonicotinamide, which can coordinate with the N atom to the CoII atoms, forming the desired onedimensional compounds. Instead of the expected chain compound, a discrete complex with additional solvate molecules of composition [Co(NCS)2(C6H6N2O)4]2C6H6N2OC2H5OH was obtained in the current study and characterized by single-crystal X-ray diffraction
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