Crystal structure of di­ethano­lbis(thio­cyanato)­bis(urotropine)cobalt(II) and tetra­ethano­lbis(thio­cyanato)­cobalt(II)–urotropine (1/2)

The reaction of one equivalent Co(NCS)(2) with four equivalents of urotropine (hexa­methyl­ene­tetra­mine) in ethanol leads to the formation of two compounds, namely, bis­(ethanol-κO)bis­(thio­cyanato-κN)bis­(urotropine-κN)cobalt(II), [Co(NCS)(2)(C(6)H(12)N(4))(2)(C(2)H(6)O)(2)] (1), and tetra­kis­(ethanol-κO)bis­(thio­cyanato-κN)cobalt(II)–urotropine (1/2), [Co(NCS)(2)(C(2)H(6)O)(4)]·2C(6)H(12)N(4) (2). In 1, the Co cations are located on centers of inversion and are sixfold coordinated by two terminal N-bonded thio­cyanate anions, two ethanol and two urotropine ligands whereas in 2 the cobalt cations occupy position Wyckoff position c and are sixfold coordinated by two anionic ligands and four ethanol ligands. Compound 2 contains two additional urotropine solvate mol­ecules per formula unit, which are hydrogen bonded to the complexes. In both compounds, the building blocks are connected via inter­molecular O—H⋯N (1 and 2) and C—H⋯S (1) hydrogen bonding to form three-dimensional networks.