Bis(2,2'-bipyridine-κ(2)N,N')(3-methyl-benzoato-κ(2)O,O')zinc 3-methyl-benzo-ate-3-methyl-benzoic acid-water (1/1/2).

The title compound, [Zn(C(8)H(7)O(2))(C(10)H(8)N(2))(2)](C(8)H(7)O(2))·C(8)H(8)O(2)·2H(2)O, is comprised of a Zn(2+) cation, two 2,2'-bipydine (bipy) ligands and one 3-methyl-benzoate anion (L(-)) together with one uncoordinating L(-) anion, one uncoordinating HL mol-ecule and two lattice water mol-ecules. The Zn(II) atom is coordinated by four N atoms of two bipy ligands and two O atoms from one L(-) ligand in a distorted octa-hedral geometry. Pairs of centrosymmetrically related complex mol-ecules form dimers via slipped π-stacking inter-actions between bipy ligands with an inter-planar distance of 3.470 (4) Å. The dimers are linked into supra-molecular chains along [111], via C-H⋯O hydrogen bonds. The uncoordinated L(-) anions, HL mol-ecules and water mol-ecules are connected with each other via O-H⋯O hydrogen bonds, forming chains between the metal complex chains and binding them together via C-H⋯O contacts. The resulting layers parallel to (010) are further assembled into a three-dimensional supra-molecular architecture through additional C-H⋯O inter-actions.

(2,2'-Bipyridine-κ(2)N,N')bis-(4-formyl-benzoato-κO(1))copper(II).

The title mononuclear Cu(II) complex, [Cu(C(8)H(5)O(3))(2)(C(10)H(8)N(2))], is comprised of a Cu(II) cation, two 4-formyl-benzoate (L(-)) ligands and a 2,2'-bipyridine (bipy) ligand. The Cu(II) ion and bipy ligand lie on a crystallographic twofold rotation axis; the Cu(II) ion is coordinated by two N atoms from one bipy ligand and two O atoms from two different carboxyl-ate groups of two L(-) ligands, exhibiting effectively a distorted square-planar geometry. The complex mol-ecules are inter-linked to generate two-dimensional supra-molecular layers in the ab plane, formed by C-H⋯O hydrogen bonds, where the O acceptor is the O atom from the carboxyl-ate group not involved in coordination to the Cu(II) ion. The two-dimensional layers are stacked in a sequence via C-H⋯O hydrogen-bonding inter-actions where the formyl O atom acts as acceptor.

4-[3-(Pyridin-4-yl)prop-yl]pyridinium 2-carb-oxy-benzoate.

In the title molecular salt, C(13)H(15)N(2) (+)·C(8)H(5)O(4) (-), the 2-carb-oxy-benzoate anions are joined into a chain along [010] by strong O-H⋯O hydrogen bonds, with the H atoms disordered about the inter-vening centres of inversion. The presence of N-H⋯O hydrogen bonds between cations generates an additional chain along [010] and parallel to that of the anions. The chains are assembled into a three-dimensional framework via weak C-H⋯O inter-chain inter-actions. In the cation, thee dihedral angle between the pyridine rings is 48.91 (4)°.

Di-µ-adipato-κ4O¹:O6-bis-{aqua-[5,6-di-phenyl-3-(pyridin-2-yl)-1,2,4-triazine-κ²N²,N³]copper(II)}.

In the centrosymmetric binuclear title complex, [Cu2(C6H8O4)2(C20H14N4)2(H2O)2] or [Cu2(PDPT)2(C6H8O4)2(H2O)2] (PDPT = 3-(2-pyrid-yl)-5,6-diphenyl-1,2,4-triazine, the Cu atom displays a distorted square-pyramidal coordination environment with the basal plane occupied by two PDPT N atoms and two O atoms from different adipate dianions while a water mol-ecule is located at the apical position. Of the two water H atoms, one participates in an intra-molecular hydrogen bond whereas the second participates in an inter-molecular hydrogen bond, which leads to the formation of a chain along [010].

Bis(2-methyl-benzoato-κO,O')(1,10'-phenanthroline-κN,N')copper(II).

In the title compound, [Cu(C(8)H(7)O(2))(2)(C(12)H(8)N(2))], the Cu(II) atom assumes a distorted octa-hedral coordination geometry, chelated by two N atoms from the 1,10'-phenanthroline ligand and four O atoms from two 2-methyl-benzoate anions. A significant Jahn-Teller distortion is observed with two axial Cu-O distances significantly longer than those in the equatorial CuO(2)N(2) plane. In the crystal, π-π stacking inter-actions, with centroid-centroid distances of 3.547 (3) or 3.728 (3) Šbetween the phenanthroline rings, form layers parallel to (011).