Sungho Yoon

Bis(4-amino-pyridine){2,2'-[1,2-phenyl-enebis(nitrilo-methanylyl-idene)]diphen-ol-ato}cobalt(III) nitrate.

In the title compound, [Co(C20H14N2O2)(C5H6N2)2]NO3, the CoIII atom is coordinated in a slightly elongated octahedral geometry by the N2O2 donor set of the tetradentate Schiff base ligand and by the pyridine N atoms of two trans-arranged monodentate 4-aminopyridine molecules. The pyridine rings are aligned nearly perpendicularly to each other [dihedral angle = 82.28 (13)°]. The phenoxy rings form dihedral angles of 12.37 (12) and 12.16 (14)° with the phenylene ring. In the crystal, N—H⋯O and C—H⋯O hydrogen bonds link the ions into a three-dimensional network.

Bis(4,4′′-difluoro-1,1′:3′,1′′-terphenyl-2′-carboxyl­ato-κO)tetra­kis­(methanol-κO)calcium methanol tetra­solvate

In the title compound, [Ca(C19H11F2O2)2(CH3OH)4]·4CH3OH, the Ca2+ ion is located on an inversion centre and is hexacoordinated by two O atoms of two 4,4′′-difluoro-1,1′:3′,1′′-terphenyl-2′-carboxylate ligands and four O atoms of four methanol ligands, forming a CaO6 polyhedron with a slightly distorted octahedral coordination geometry. The Ca—O—C angle between the carboxylate group and the calcium ion is 171.8 (2)°. Two types of intermolecular hydrogen-bond interactions (C=O⋯H and O—H⋯O) between the carboxylate ligand, the methanol solvent molecules and the coordinating methanol ligands generate a two-dimensional network parallel to (001).

Bis(μ-4,4′′-difluoro-1,1′:3′,1′′-terphenyl-2′-carboxylato-κ2O:O′)bis[aqua(4,4′′-di­fluoro-1,1′:3′,1′′-terphenyl-2′-carboxyl­ato-κO)(pyridine-κN)cobalt(II)] diethyl ether disolvate

The structure of the title compound, [Co2(C19H11F2O2)4(C5H5N)2(H2O)2]·2C4H10O, comprises two CoII atoms in a distorted square pyramidal coordination environment, straddling a crystallographic inversion center with a Co⋯Co separation of 3.1923 (15) Å. Each Co2+ cation is coordinated by three O atoms of three 4,4′′-difluoro-1,1′:3′,1′′-terphenyl-2′-carboxylate ligands, one water O atom and one pyridine N atom, forming a CoO4N polyhedron. Strong intramolecular O—H⋯O hydrogen bonds are observed between terminal metal-bound carboxylate groups and water O atoms.

Dichloridobis(2-phenyl-pyridine-κN)zinc(II).

In the title compound, [ZnCl2(C11H9N)2], the Zn2+ cation lies on a twofold axis and is coordinated by two Cl− anions and the N atoms of two 2-phenylpyridine ligands, forming a ZnN2Cl2 polyhedron with a slightly distorted tetrahedral coordination geometry. The dihedral angle between the phenyl ring and the metal-bound pyridine ring is 50.3 (4)° for each 2-phenylpyridine ligand. This arranges the phenyl ring from one ligand in the complex above the pyridine ring of the other resulting in an intramolecular π–π interaction, with a centroid–centroid distance of 3.6796 (17) Å. Weak C—H⋯Cl hydrogen bonds stabilize the crystal packing, linking molecules into chains along the c axis.

Bis(4,4′′-difluoro-1,1′:3′,1′′-terphenyl-2′-carboxyl­ato-κO)bis­(3,5-dimethyl-1H-pyrazole-κN2)manganese(II)

In the title compound, [Mn(C19H11F2O2)2(C5H8N2)2], the Mn2+ cation is coordinated by the N atoms of two 3,5-dimethylpyrazole ligands and carboxylate O atoms from two 4,4′′-difluoro-1,1′:3′,1′′-terphenyl-2′-carboxylato ligands, forming an MnN2O2 polyhedron with a slightly distorted tetrahedral coordination geometry. Two intramolecular hydrogen bonds are observed between the carboxylate and pyrazole ligands. The combined influence of the sterically hindered carboxylate ligands and the intramolecular hydrogen-bonding interactions stabilizes the title compound with a low coordination number of four. In the crystal, weak C—H⋯F and C—H⋯O hydrogen bonds are observed.

Bis(3,5-dimethyl-1H-pyrazole-κN2)bis­(3,3′′,5,5′′-tetra­methyl-[1,1′:3′,1′′-terphen­yl]-2′-carboxyl­ato-κO)iron(II) dichloro­methane monosolvate

In the title compound, [Fe(C23H21O2)2(C5H8N2)2]·CH2Cl2, the Fe2+ cation is coordinated by the N atoms of two 3,5-dimethylpyrazole ligands and the carboxylate O atoms from two tetramethylterphenylcarboxylate ligands, forming an FeN2O2 polyhedron with a slightly distorted tetrahedral coordination geometry. Intramolecular N—H⋯O and C—H⋯O hydrogen-bonding interactions stabilize the molecular conformation. The dihedral angles formed by the central benzene ring with the outer benzene rings of the terphenyl groups are 47.92 (8), 59.38 (8), 48.24 (8) and 52.37 (8)°. The dichloromethane solvent molecule interacts with the complex molecule via a C—H⋯O hydrogen bond. In the crystal, centrosymmetrically related complex molecules are linked into dimers through pairs of C—H⋯O hydrogen bonds.