catena-Poly[[hexa­kis(μ-4-methyl­benzoato)-κ2 O,O′;κ15 O,O′:O-trieuropium(III)]-tris­(μ-4-methyl­benzoato)-κ2 O,O′;κ6 O,O′:O]

The title europium(III) carboxyl­ate, [Eu3(C8H7O2)9]n, has three independent Eu atoms, two of which are eight-coordinate in a square-anti­prismatic coordination geometry, whereas the third is nine-coordinate in a tricapped trigonal-prismatic coordination geometry. The metal atoms are linked by two bidentate and seven tridentate methyl­benzoate groups into a linear chain running along the b-axis direction

Diaqua­bis(4-methyl­benzoato-κO)zinc(II)

The Zn atom in the title mononuclear complex, [Zn(C8H7O2)2(H2O)2], lies on a special position of site symmetry 2. The carboxyl­ate group binds in a monodentate manner so that the geometry is best described as tetra­hedral. Adjacent mol­ecules are linked by O—H⋯O hydrogen bonds into a three-dimensional network

Aqua­chlorido(4-methyl­benzoato-κO)(1,10-phenanthroline-κ2 N,N′)copper(II)

In the title mononuclear complex, [Cu(C8H7O2)Cl(C12H8N2)(H2O)], the CuII atom is coordinated by one carboxylate O atom from a monodentate 4-methyl­benzoate ligand, two N atoms from the 1,10-phenanthroline ligand, one chloride ion and one water mol­ecule in a square-pyramidal geometry. The crystal structure exhibits inter- and intra­molecular C—H⋯Cl, C—H⋯O, O—H⋯Cl and O—H⋯O hydrogen bonds, as well as C—H⋯π inter­actions of phenanthroline and methyl H atoms towards the π-systems of neighboring 4-methyl­benzoate units and the pyridine rings of the phenanthroline system [centroid–centroid distances are 2.706 (2) and 2.992 (1) Å, respectively]

Poly[penta­aqua­tetra­kis(μ2-nicotinato-κ2 N:O)(perchlorato-κO)lanthanum(III)disilver(I)]

In the title complex, [Ag2La(C6H4NO2)4(ClO4)(H2O)5]n, the LaIII atom, lying on a twofold rotation axis, is eight-coordinated by four O atoms from four nicotinate (nic) ligands and four water mol­ecules in a distorted square-anti­prismatic coordination geometry. The AgI atom is coordinated in an almost linear fashion by two pyridyl N atoms of two nic ligands. The linear coordination is augmented by weak inter­actions with one O atom from a half-occupied ClO4 − anion and a water mol­ecule lying on a twofold axis. Two Ag(nic)2 units connect two La atoms, forming a cyclic unit. These units are further extended into an infinite zigzag chain. The chains are bridged by the disordered perchlorate ions via weak Ag—O [2.678 (2) Å] inter­actions. O—H⋯O hydrogen bonds, weak Ag⋯Ag [3.3340 (15) Å] inter­actions and π–π inter­actions between the pyridyl rings [centroid–centroid distance = 3.656 (2) Å] lead to a three-dimensional network

Aqua­bis(1H-imidazole-κN 3)bis­(4-methyl­benzoato-κ2 O,O′)cadmium(II)

In the title compound, [Cd(C8H7O2)2(C3H4N2)2(H2O)], the CdII atom is coordinated by four carboxyl­ate O atoms from two bidentate chelating 4-methyl­benzoate ligands, two N atoms from two imidazole ligands and one water mol­ecule in a distorted penta­gonal bipyramidal geometry. Inter­molecular O—H⋯O hydrogen bonds between the coordinated water mol­ecule and the carboxyl­ate O atoms of 4-methyl­benzoate lead to an infinite chain. These chains are further self-assembled into a two-dimensional layer through N—H⋯O hydrogen bonds between the imidazole ligands and carboxyl­ate groups. One of the imidazole ligands is disordered over two positions with site-occupancy factors of 0.737 (4) and 0.263 (4)

Aqua­bis(4-methyl­benzoato)-κO;κ2 O,O′-bis­(pyridine-κN)nickel(II)

In the title mononuclear complex, [Ni(C8H7O2)2(C5H5N)2(H2O)], the NiII atom is in a distorted octa­hedral arrangement, coordinated by three carboxylate O atoms from one bidentate 4-methyl­benzoate ligand and one monodentate 4-methyl­benzoate ligand, two N atoms from pyridine ligands, axially positioned, and a water mol­ecule. The equatorially positioned water mol­ecule and uncoordinated carb­oxylate O atom form an intra­molecular hydrogen bond. An inter­molecular O—H⋯O hydrogen bond between the coordinated water mol­ecule and carboxylate O atom of the 4-methyl­benzoate ligand forms infinite chains along the b axis. These chains are connected by C—H⋯π inter­actions

Bis(1H-benzimidazole-κN 3)bis­(4-methyl­benzoato-κ2 O,O′)copper(II)

In the title mononuclear complex, [Cu(C8H7O2)2(C7H6N2)2], the CuII atom lies on an inversion centre and is coordinated by two O atoms of two monodentate 4-methyl­benzoate ligands and two N atoms of two benzimidazole ligands in a square-planar geometry. The mol­ecules are linked into chains running parallel to the b axis by inter­molecular N—H⋯O hydrogen bonds and by π–π stacking inter­actions [centroid–centroid distance = 3.669 (2) Å] involving centrosymmetrically related imidazole rings

5H-Imidazo[4,5-f][1,10]phenanthroline

The title mol­ecule, C13H8N4, is is essentially planar [r.m.s. deviation for all non-H atoms = 0.025 (3) Å]. In the crystal, mol­ecules are connected through one weak bifurcated N—H⋯(N,N) hydrogen bond and three π–π stacking inter­actions between pyridine and imidazole rings [centroid–centroid distance = 3.631 (8) Å] and between pyridine and benzene rings [centroid–centroid distances = 3.675 (5) and 3.666 (2) Å]