Redetermination of bis­(O,O'-dicyclo­hexyl phospho­rodithio­ato)nickel(II)

The structure of the title compound, [Ni(C₁₂H₂₂O₂PS₂)₂], has been determined previously [Chichang et al. (1987). Chin. J. Struct. Chem. 6, 186], but the current determination provides a significant increase in the precision of the geometric parameters. The Ni^II atom lies on a crystallographic center of symmetry in a distorted square-planar coodination environment.

Bis{1-[(4-methoxy­phen­yl)amino]-2-methyl­glyoximato-κ²N,N′}nickel(II)

The title mol­ecule, [Ni(C₁₀H₁₂N₃O₃)₂], possesses a crystallographic centre of symmetry at the Ni^II atom. The coordin­ation geometry around the Ni^II atom is distorted square planar, consisting of four N atoms from two oxime ligands. The crystal packing shows two-dimensional polymeric chains, which are stabilized by a hydrogen-bonded network, and other weak inter­molecular inter­actions.

Bis[1-(2,6-dimethyl­anilino)propane-1,2-dione dioximato]nickel(II)

The structure of the title complex consists of isolated [Ni(C₁₁H₁₄N₃O₂)₂] units. The Ni atom is coordinated by four oxime N atoms in distorted square-planar geometry and lies on an inversion centre. The structure is stabilized by strong intra­molecular N—H...O and O—H...O hydrogen bonds and a possible N—H...π inter­molecular inter­action.