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    Öğe
    Bis(isonicotinamide-?N 1)bis(4-methylbenzoato-?O)copper(II) dihydrate
    (Int Union Crystallography, 2010) Hokelek, Tuncer; Saka, Guner; Tercan, Baris; Cimen, Efdal; Necefolu, Hacali
    In the centrosymmetric title compound, [Cu(C8H7O2)(2)(C6H6N2O)(2)]center dot 2H(2)O, the CuII ion is located on a crystallographic inversion center. The asymmetric unit is completed by one 4-methylbenzoate anion, one isonicotinamide (INA) ligand and one uncoordinated water molecule; all the ligands are monodentate. The two O and the two N atoms around the CuII ion form a slightly distorted square-planar arrangement. The dihedral angle between the carboxylate group and the attached benzene ring is 13.86 (9)degrees, while the pyridine and benzene rings are oriented at a dihedral angle of 86.08 (5)degrees. The uncoordinated water molecules are linked to the INA ligands by O-H...O hydrogen bonds. In the crystal structure, intermolecular O-H...O, N-H...O and C-H...O hydrogen bonds link the molecules into a three-dimensional network.
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    Öğe
    catena-Poly[[bis(4-methylbenzoato-?2 O:O')lead(II)]-?-nicotinamide-?2 N 1:O]
    (Int Union Crystallography, 2010) Hokelek, Tuncer; Dal, Hakan; Tercan, Baris; Cimen, Efdal; Necefolu, Hacali
    In the title compound, [Pb(C8H7O2)(2)(C6H6N2O)] (n) , the PbII ion is coordinated by two 4-methylbenzoate (PMB) and one nicotinamide (NA) ligands while symmetry-related NA ligands bridge adjacent PbII ions, forming polymeric chains along the c axis. The carboxylate groups in the two PMB ions are twisted away from the attached benzene ring by 22.9 (2) and 4.6 (2)degrees. The two benzene rings of the PMB ions are oriented at a dihedral angle of 83.7 (1)degrees. In a polymeric chain, the NA ligands are linked to PMB ions through intramolecular N-H...O hydrogen bonds. In the crystal structure, adjacent polymeric chains interact via N-H...O and C-H...O hydrogen bonds, forming a two-dimensional network parallel to the bc plane.