The Au^III atoms in the cationic pseudo-square-planar complex tetra­kis­(1-methyl-2,3-di­hydro-1H-imidazole-2-thione-κS)gold(III) trichloride sesquihydrate reside at the corners of the unit cell on an inversion center and are bound by the S atoms of four methimazole ligands in a planar arrangement, with S—Au—S bond angles of approximately 90°.

In the title compound, the mononuclear nickel(II) complex exhibits point group symmetry .

The coordination environment of the Ni^II atom is slightly distorted square planar, whereas the appearance of the whole mol­ecule is twisted.

The Ni^II atom in the title compound shows a distorted square-planar P₂N₂ coordination set provided by two bidentate ligands.

The steric requirement resulting from the substituted methyl or phenyl group at the ortho-position of the coordinating quinoline-N atom in 8-(di­phenyl­phosphan­yl)quinoline enforces the square-planar coordination geometry of the di­chlorido­palladium(II) center to be highly distorted.

In the cation of the title complex, the central palladium(II) atom is surrounded by two bidentate ligands, 2,2′-bi­pyridine and 4,4′-dimeth­oxy-2,2′-bi­pyridine, in a distorted square-planar environment.

In the crystal structure of the title compound, the palladium(II) metal center is surrounded by a bidentate 2,2′-bi­pyridine ligand and two aceto­nitrile mol­ecules in a distorted square-planar geometry.

The properties of Hirshfeld surfaces around Cu(II) atoms in coordination complexes are sensitive to coordination geometry and weak interactions.

A symmetrical dicarbonohydrazide was used to synthesize a centrosymmetric tetra­nuclear zinc(II) complex in which two of the zinc cations are penta­coordinated and the other two are hexa­coordinated.

The mol­ecular Pd^II title complex exhibits a square-planar coordination about the central metal atom, provided by two trans-arranged chlorido ligands and two nitro­gen atoms from the two neutral organic ligands.