Crystal structure of cis-bis­[4-phenyl-2-(1,2,3,4-tetra­hydro­naphthalen-1-yl­idene)hydrazinecarbo­thio­amidato-κ(2) N (1),S]nickel(II) monohydrate tetra­hydro­furan disolvate

The reaction of Ni(II) acetate tetra­hydrate with the ligand 4-phenyl-2-(1,2,3,4-tetra­hydro­naphthalen-1-yl­idene)hydrazinecarbo­thio­amide in a 2:1 molar ratio yielded the title compound, [Ni(C(16)H(16)N(3)S)(2)]·2C(4)H(8)O·H(2)O. The deprotonated ligands act as N,S-donors, forming five-membered metallacycles with the metal ion exhibiting a cis coordination mode unusual for thio­semicarbazone complexes. The Ni(II) ion is four-coordinated in a tetra­hedrally distorted square-planar geometry. Trans-arranged anagostic C—H⋯Ni inter­actions are observed. In the crystal, the complex mol­ecules are linked by water mol­ecules through N—H⋯O and O—H⋯S hydrogen-bonding inter­actions into centrosymmetric dimers stacked along the c axis, forming rings of graph-set R (4) (4)(12). Classical O—H⋯O hydrogen bonds involving the water and tetra­hydro­furan solvent mol­ecules as well as weak C—H⋯π inter­actions are also present.