Synthesis, crystal structure and Hirshfeld and thermal analysis of bis[benzyl 2-(heptan-4-yl-idene)hydrazine-1-carboxyl-ate-κ2 N 2,O]bis(thio-cyanato)-nickel(II).

The title centrosymmetric NiII complex, [Ni(NCS)2(C15H22N2O2)2], crystallizes with one half mol-ecule in the asymmetric unit of the monoclinic unit cell. The complex adopts an octa-hedral coordination geometry with two mutually trans benzyl-2-(heptan-4-yl-idene)hydrazine-1-carboxyl-ate ligands in the equatorial plane with the axial positions occupied by N-bound thio-cyanato ligands. The overall conformation of the mol-ecule is also affected by two, inversion-related, intra-molecular C-H⋯O hydrogen bonds. The crystal structure features N-H⋯S, C-H⋯S and C-H⋯N hydrogen bonds together with C-H⋯π contacts that stack the complexes along the b-axis direction. The packing was further explored by Hirshfeld surface analysis. The thermal properties of the complex were also investigated by simultaneous TGA-DTA analyses.