Synthesis, crystal structure and thermal properties of di-aqua-bis-(4-methyl-pyridine-κ)bis-(thio-cyanato-κ)cobalt(II).

The reaction of Co(NCS) and 4-methyl-pyridine (CHN) in water leads to the formation of light-blue single crystals of the title compound, [Co(NCS)(CHN)(HO)]. The asymmetric unit consists of one Co cation (site symmetry 1) as well as one thio-cyanate anion, one 4-methyl-pyridine coligand and one water mol-ecule in general positions to generate -CoNO octa-hedra. In the crystal, the complexes are linked by O-H⋯S hydrogen bonds into a layered network. Powder X-ray diffraction (PXRD) shows that a pure sample has been obtained. Upon heating, the title compound loses its water mol-ecules and transforms into Co(NCS)(CHN), which is already reported in the literature.