μ-Oxo-κ²O:O-bis­[bis­(1,10-phenanthroline-κ²N,N′)(sulfato-κO)iron(III)] octa­hydrate

In the crystal structure of the title binuclear iron(III) complex, [FeO(SO₄)₂(C₁₂H₈N₂)₄]·8H₂O, the Fe atoms are connected by an O atom, which lies on a twofold axis. Each Fe atom is also coordinated by four N atoms of two 1,10-phenanthroline ligands and one O atom of a sulfate ion, resulting in a distorted octa­hedral geometry. The Fe...Fe separation is 3.5552 (21) Å and the Fe—O—Fe bridge angle is 172.81 (12)°. The crystal packing is stabilized by a network of O—H...O hydrogen bonds.

(Benzene-1,2-diolato-κ²O,O′)(2,2′-bipyridine-κ²N,N′)palladium(II)

In the title complex, [Pd(C₆H₄O₂)(C₁₀H₈N₂)], the central Pd atom has a distorted cis planar four-coordination geometry defined by two O atoms of the benzene-1,2-diolate dianion and the two N atoms of a 2,2′-bipyridine ligand. The mol­ecule is essentially planar.

(1,1-Cyclo­butane­dicarboxyl­ato-κ²O,O′)(2,2′-biquinoline-κ²N,N′)palladium(II) monohydrate

In the title compound, [Pd(C₆H₆O₄)(C₁₈H₁₂N₂)]·H₂O, the Pd^II atom has a distorted cis-planar four-coordination geometry defined by two O atoms of a bidentate 1,1-cyclo­butane­dicarboxyl­ate anion and two N atoms of the 2,2′-biquinoline ligand. In the crystal structure, centrosymmetric clusters of the complex mol­ecules and water mol­ecules are formed through O—H...O hydrogen bonds.

(1,2-Benzene­diolato-κ²O,O′)(2,2′-biquinoline-κ²N,N′)palladium(II)

In the title complex, [Pd(C₆H₄O₂)(C₁₈H₁₂N₂)], the central Pd atom has a distorted cis-planar four-coordination geometry defined by two O atoms of a 1,2-benzene­diolate dianion and two N atoms of a 2,2′-biquinoline ligand. The overall structure of the complex is not planar, with a dihedral angle of 136.23 (8)° between the quinoline and benzene­diolate mean planes.

Redetermination of (2,2′-bipyridyl-κ²N,N′)chloro­(glycinato-κ²N:O)copper(II) dihydrate

The redetermined structure of the title compound, [Cu(C₂H₄NO₂)Cl(C₁₀H₈N₂)]·2H₂O, confirms that reported earlier [Neitzel & Desiderato (1975). Cryst. Struct. Commun. 4, 333–336] with respect to the non-H atoms. All the H atoms have been located in the present study and the network of N—H...O, N—H...Cl, O—H...O and O—H...Cl hydrogen bonds has been elucidated.

(Adeninato-N⁹)[N-(2-amino­ethyl)salicylideneiminato]palladium(II) 3.5-hydrate

In the title compound, {[(2-amino­ethyl)imino­meth­yl]phenolato-κ³N,N′,O}(9H-purine-6-aminato-κN⁹)palladium(II) 3.5-hydrate, [Pd(C₅H₄N₅)(C₉H₁₁N₂O)]·3.5H₂O, the Pd^II ion is coordinated by the N9 atom of the adeninate ligand, two N atoms and one O atom of the N-(2-amino­ethyl)salicylideneiminate in a square-planar coordination. The crystal structure is stabilized by centrosymmetric stacking inter­actions between neighbouring complexes, and by hydrogen bonds involving adeninate and N-(2-amino­ethyl)salicylideneiminate ligands, and non-coordinated water mol­ecules.