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In the title complex, [Zn(C(7)H(6)NO(2))(2)(C(10)H(8)N(2))], the Zn(II) cation is coordinated by two amino-benzoate anions and one 2,2'-bipyridine ligand in a distorted trigonal-bipyramidal geometry. The carboxyl-ate group of one aminobenzoate anion coordinates to the Zn(II) cation in a monodentate manner, whereas the carboxyl-ate group of the other amino-benzoate anion chelates the Zn cation with different Zn-O bond lengths. Inter-molecular N-H⋯N and N-H⋯O hydrogen bonding is present in the crystal structure.

In the title compound, C14H13NO4S·C3H7NO, the C—S—N—C torsion angle of −64.55 (17)° defines the folded conformation of the molecule. The dihedral angle between the benzene rings is 83.367 (6)°. In a crystal, molecules are linked into a chain along a axis through intermolecular N—H...O and O—H...O hydrogen bonds. There is also an intramolecular C—H...π interaction.

In the title complex, [Cu(C10H12NO4S)(OH)(C10H8N2)]·0.5H2O, the Cu(II) ion shows a distorted square-pyramidal coordination geometry with two N atoms from the 2,2′-bipyridine ligand and one N and one O atom from the N-tosyl-α-alaninato ligand forming the basis of the coordination polyhedron and another O atom of the hydroxo group acting as the apex of the pyramid. The solvent water mol­ecule is statistically disordered over two positions.

In the title centrosymmetric dinuclear complex, [Nd(2)(C(27)H(24)Br(3)N(4)O(3))(2)]·6C(3)H(7)NO, the Nd(III) ion is coordinated in a slightly distorted square-anti-prismatic geometry by four N atoms and four O atoms from two centrosymmetrically-related 1,3-bis-[2-(5-bromo-2-oxidobenzyl-amino)eth-yl]-2-(5-bromo-2-oxidophen-yl)-1,3-imidazolidine ligands. The Nd⋯Nd separation is 4.5012 (12) Å.

The title complex, [Cu(2)(C(7)H(6)NO(2))(2)(C(12)H(8)N(2))(2)(H(2)O)(2)]·2C(7)H(7)NO(2)·2H(2)O, consists of a dinuclear [Cu(2)(C(7)H(6)NO(2))(2)(C(12)H(8)N(2))(2)(H(2)O)(2)](2+) cation, two Cl(-) anions, two 4-amino-benzoic acid mol-ecules and two disordered water mol-ecules (site occupancy factors 0.5). The Cu(II) ion adopts a distorted square-pyramidal geometry formed by two N atoms from the 1,10-phenanthroline ligand and two O atoms of the two 4-amino-benzoic acid ligands and one water O atom. The Cu⋯Cu separation is 3.109 (2) Å. A twofold axis passes through the mid-point of the Cu⋯Cu vector.