μ-Succinato-bis­[aqua­(2,2′:6′,2′′-terpyridine)copper(II)] dinitrate dihydrate

The title compound, [Cu2(C4H4O4)(C15H11N3)2(H2O)2](NO3)2·2H2O, was synthesized under hydro­thermal conditions. The dinuclear copper complex is located on a crystallographic inversion centre. The CuII ion is penta­coordinated in a tetra­gonal–pyramidal geometry, with one O atom of a succinate dianion and three N atoms of a 2,2′:6′,2′′-terpyridine ligand occupying the basal plane, and a water O atom located at the apical site. In the crystal structure, O—H⋯O hydrogen bonding links the mol­ecules into a chain parallel to the a axis

1-(4-Bromo-2-fluoro­benz­yl)pyridinium bis­(2-thioxo-1,3-dithiole-4,5-dithiol­ato)nickelate(III)

The title compound, (C12H10BrFN)[Ni(C3S5)2], is an ion-pair complex consisting of N-(2-fluoro-4-bromo­benz­yl)pyridinium cations and [Ni(dmit)2]− anions (dmit = 2-thioxo-1,3-dithiole-4,5-dithiol­ate). In the anion, the NiIII ion exhibits a square-planar coordination involving four S atoms from two dmit ligands. In the crystal structure, weak S⋯S [3.474 (3), 3.478 (3) and 3.547 (3) Å] and S⋯π [S⋯centroid distances = 3.360 (3), 3.378 (2), 3.537 (2) and 3.681 (3) Å] inter­actions and C—H⋯F hydrogen bonds lead to a three-dimensional supra­molecular network

Triaqua­bis(1H-imidazole)bis­[μ2-2-(oxalo­amino)benzoato(3−)]dicopper(II)calcium(II) hepta­hydrate

In the title heterotrinuclear coordination compound, [CaCu2(C9H4NO5)2(C3H4N2)2(H2O)3]·7H2O, the Ca2+ cation is in a penta­gonal–bipyramidal geometry and bridges two (1H-imidazole)[2-(oxaloamino)benzoato(3−)]copper(II) units in its equatorial plane. Each CuII atom has a normal square-planar geometry. The mol­ecule has approximate local (non-crystallographic) mirror symmetry and 23 classical hydrogen bonds are found in the crystal structure