A tetra-nuclear cubane-like nickel(II) complex with a tridentate salicyl-idene-imine Schiff base ligand: tetra-kis-[?₃-4-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(?₃-O₄)] core is formed via the O atoms from the Schiff base ligands. The octa-hedrally coordinated Ni^II ions occupy alternating vertices of the cube. Each Ni^II ion is coordinated by one O,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 stabilized via an 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 obtained via intra-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 the c axis via weak 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 unit via an inter-molecular C-H?O hydrogen bond involving a phenolate O atom.

SUBMITTER: Pavlovic G 

PROVIDER: S-EPMC5137606 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature