Crystal structure of di-ethano-lbis(thio-cyanato)-bis(urotropine)cobalt(II) and tetra-ethano-lbis(thio-cyanato)-cobalt(II)-urotropine (1/2).

The reaction of one equivalent Co(NCS) with four equivalents of urotropine (hexa-methyl-ene-tetra-mine) in ethanol leads to the formation of two compounds, namely, bis-(ethanol-κ)bis-(thio-cyanato-κ)bis-(urotropine-κ)cobalt(II), [Co(NCS)(CHN)(CHO)] (), and tetra-kis-(ethanol-κ)bis-(thio-cyanato-κ)cobalt(II)-urotropine (1/2), [Co(NCS)(CHO)]·2CHN (). In , the Co cations are located on centers of inversion and are sixfold coordinated by two terminal N-bonded thio-cyanate anions, two ethanol and two urotropine ligands whereas in the cobalt cations occupy position Wyckoff position and are sixfold coordinated by two anionic ligands and four ethanol ligands. Compound contains two additional urotropine solvate mol-ecules per formula unit, which are hydrogen bonded to the complexes. In both compounds, the building blocks are connected inter-molecular O-H⋯N ( and ) and C-H⋯S () hydrogen bonding to form three-dimensional networks.