title: A tetra-nuclear cubane-like nickel(II) complex with a tridentate salicyl-idene-imine Schiff base ligand: tetra-kis-[μ3-4-methyl-N-(2-oxidophen-yl)salicylideneiminato]tetra-kis-[methano-lnickel(II)] methanol 0.8-solvate.
abstract: The tetra-nuclear title complex, [Ni4(C14H11NO2)4(CH3OH)4]·0.8CH3OH, has a distorted cubane topology shaped by four Schiff base ligands. The cubane [Ni4(μ3-O4)] core is formedviathe O atoms from the Schiff base ligands. The octa-hedrally coordinated NiIIions occupy alternating vertices of the cube. Each NiIIion is coordinated by oneO,N,O'-tridentate dianionic ligand, two O atoms of oxidophenyl groups from adjacent ligands and the O atom of a coordinating methanol mol-ecule. The cubane core is stabilizedviaan intra-molecular O-H⋯O hydrogen bond between the hy-droxy group of the coordinating methanol mol-ecules and the phenolate O atom of the aldehyde Schiff base fragment. Additional stabilization is obtainedviaintra-molecular C-H⋯O hydrogen bonds involving aromatic C-H groups and the oxygen atoms of adjacent methanol mol-ecules. In the crystal, complex mol-ecules are linked into chains parallel to thecaxisviaweak C-H⋯O hydrogen bonds. The partial-occupancy disordered methanol solvent mol-ecule has a site occupancy of 0.8 and is linked to the tetra-nuclear unitviaan inter-molecular C-H⋯O hydrogen bond involving a phenolate O atom.
authors.affiliation: University of Zagreb, Faculty of Textile Technology, Laboratory of Applied Chemistry, Prilaz baruna Filipovića 28a, HR-10000 Zagreb, Croatia.
authors.forename: Gordana
authors.initials: G
authors.lastname: Pavlović
authors.affiliation: University of Zagreb, Faculty of Science, Department of Chemistry, Horvatovac 102a, HR-10000 Zagreb, Croatia.
authors.forename: Mihael
authors.initials: M
authors.lastname: Majer
authors.affiliation: University of Zagreb, Faculty of Science, Department of Chemistry, Horvatovac 102a, HR-10000 Zagreb, Croatia.
authors.forename: Marina
authors.initials: M
authors.lastname: Cindrić
keywords: Schiff bases; crystal structure; nickel cubane-like tetra­mers