Crystal structure of {6,6′-dibenzoyl-4,4′-di-tert-butyl-2,2′-[(ethane-1,2-di­yl)di­nitrilo­bis­(phenyl­methanylyl­idene)]diphenolato-κ4 O 1,N,N′,O 1′}nickel(II)

The mononuclear title complex, [Ni(C50H46N2O4)], crystallizes in the triclinic space group P-1, with two mol-ecules in the asymmetric unit (Z' = 2). Each Ni(II) atom has a slightly distorted square-planar geometry [ω = 3.91 (5)° and 2.04 (7)°] defined by the two phenolate O and two imine N atoms of the tetra-dentate Schiff base ligand. The dihedral angles between the central phenolate ring and peripheral phenyl rings are 60.5 (2)/70.0 (2) and 86.4 (2)/56.1 (2)° in mol-ecule A, and 89.43 (19)/18.0 (2) and 63.87 (19)/68.2 (2)° in mol-ecule B. The two central phenolate rings are twisted by angles of 19.37 (19) and 19.36 (18)° in the two mol-ecules. The packing is stabilized through intra- and inter-molecular C-H⋯O and C-H⋯π inter-actions, forming chains parallel to the b axis. The tert-butyl groups in one of the two mol-ecules are positionally disordered with a refined occupancy ratio of 0.707 (13):0.293 (13).