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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.

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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.

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In the title mol­ecule, C21H18O4, the C=C bond of the central enone group adopts a trans conformation. The dihedral angle formed by the naphthalene ring system and the benzene ring is 2.97 (11)°. The hy­droxy group is involved in an intra­molecular O—H...O hydrogen bond. In the crystal, weak C—H...O hydrogen bonds link the mol­ecules into chains along [001].
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