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In the title Schiff base molecule, C13H9ClFNO, the benzene rings are twisted slightly with respect to each other, making a dihedral angle of 7.92 (2)°. An intramolecular O—H...N hydrogen bond occurs. In the crystal, an infinite chain is formed along the c-axis direction by π–π stacking interactions between the phenyl rings and the six-membered hydrogen-bonded ring of neighboring Schiff base ligands [centroid–centroid distances of 3.698 (2) and 3.660 (3) Å]. Neighboring chains are linked into a three-dimensional supramolecular structure by C—H...O and C—H...F hydrogen bonds.

In the title coordination polymer, {[AgNd(C(5)H(3)N(2)O(2))(2)(C(2)O(4))]·H(2)O}(n), the Nd(III) atom is coordinated in a distorted monocapped square-anti-prismatic geometry by two O and two N atoms of two N,O-bidentate pyrazine-2-carboxyl-ate (2-pzc) ligands, four O atoms of two bidentate oxalate ligands, and one O atom of a monodentate carboxyl-ate group of a 2-pzc ligand. The Ag(I) ion is coordinated in a distorted tetra-hedral geometry by two N atoms from two monodentate 2-pzc ligands, one O atom from one monodentate oxalate ligand and one O atom of a bridging carboxyl-ate group of a 2-pzc ligand. The oxalate anions link neighbouring neodymium(III) metal centres into Nd-oxalate chains, which are inter-connected by Ag(2-pyz)(2) units, forming a three-dimensional polymeric framework. Inter-molecular O-H⋯O and C-H⋯O hydrogen bonds are observed in the crystal structure.

In the title coordination polymer, {[Ag4Er2(C6H4NO2)5(C2O4)2(NO3)(H2O)]·4H2O}n, each ErIIIatom is coordinated in a bicapped trigonal–prismatic coordination geometry by three O atoms from two isonicotinate (IN) ligands, four O atoms from two oxalate ligands and one O atom from either a nitrate ion or a water molecule, both of which are half-occupied over the same site. One AgIatom has a Y-shaped geometry defined by one N atom from one IN ligand, one O atom from another IN ligand and one O atom from an oxalate ligand. The other AgIatom is coordinated by two IN ligands and one O atom from an oxalate ligand. One of the IN ligands is disordered over an inversion center and forms a bridge between two centrosymmetric AgIions. Due to the disorder, this IN ligand coordinates to the Ag atom through either the pyridyl N or the carboxylate O atoms. The IN and oxalate ligands link the Er and Ag atoms into a three-dimensional coordination framework. O—H...O and C—H...O hydrogen bonds are observed in the crystal structure.

In the title compound, [PdCl(2)(C(6)H(6)N(2)O(2))(2)], the Pd(II) atom is coordinated in a distorted square-planar geometry by two N atoms from two 4-nitro-aniline ligands and two Cl atoms in a trans arrangement. Inter-molecular N-H⋯Cl hydrogen bonds involving the amino groups and chloride anions lead to a chain along [100]. These chains are further self-assembled into a three-dimensional network through N-H⋯O and N-H⋯Cl hydrogen bonds.

In the title dinuclear complex, [Pb2(C7H4ClO2)4(C10H8N2)], the PbII atom is five-coordinated by four carboxyl­ate O atoms from two 2-chloro­benzoate ligands and one N atom from a bridging 4,4′-bipyridine (4,4′-bpy) ligand, displaying a hemi-directed coordination. The 4,4′-bpy ligand has an inversion center at the mid-point of the central C—C bond. The empty side of the metal ion is capped by two carboxyl­ate O atoms from a neighboring mol­ecule, with weak Pb⋯O contacts [Pb⋯O = 3.069 (2) and 3.071 (3) A]. The crystal structure is stabilized by C—H⋯O hydrogen bonds and π–π stacking inter­actions between the benzene and pyridine rings [centroid–centroid distance = 3.749 (3) A].