[2-Hydroxy-N'-(4-oxo-4-phenyl-butan-2-yl-idene)benzohydrazidato(2-)]pyridine-copper(II).

The mononuclear title complex, [Cu(C(17)H(14)N(2)O(3))(C(5)H(5)N)], was synthesized by the reaction of CuCl(2)·2H(2)O with N-(4-oxo-4-phenyl-butan-2-yl-idene)benzohydrazide (H(2)L). The central Cu(II) atom exhibits a distorted square-planar coordination geometry, defined by two O atoms, one N atom from the ligand and one pyridine N atom with Cu-N distances of 1.874 (4) and 1.963 (4) Å, while the Cu-O distances are 1.857 (3) and 1.890 (3) Å. An intra-molecular O-H⋯N inter-action occurs.

(E)-N'-(3-Fluoro-benzyl-idene)-2-hydroxy-benzohydrazide.

The title compound, C(14)H(11)FN(2)O(2), adopts an E or trans configuration with respect to the C=N bond. An intra-molecular N-H⋯O hydrogen bond contributes to the relatively planarity of the mol-ecular conformation; the two benzene rings are inclined to one another by 12.5 (2)°. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into chains running parallel to the c axis.

2-[4-(4-Methoxy-phen-yl)-5-(2-pyrid-yl)-4H-1,2,4-triazol-3-yl]phenol.

In the title compound, C(20)H(16)N(4)O(2), the benzene rings of the 2-hydroxy-phenyl and 4-methoxy-lphenyl groups form dihedral angles of 64.02 (8) and 77.39 (7)°, respectively, with the mean plane of the triazole ring. The dihedral angle between the triazole ring mean plane and the pyridyl ring is 9.61 (8)°. In the crystal, inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into zigzag chains propagating in [010].

N'-(4-Chloro-benzyl-idene)-2-hydroxy-benzohydrazide.

The title mol-ecule, C(14)H(11)ClN(2)O(2), adopts a trans configuration with respect to the C=N double bond. An intra-molecular N-H⋯O hydrogen bond contributes to mol-ecular conformation and the two benzene rings form a dihedral angle of 17.9 (8)°. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into chains running along [10].

Bis(micro-4-chlorobenzoato-kappa(2)O:O)bis[(2-aminopyridine-kappaN)silver(I)].

The title compound, [Ag(2)(C(7)H(4)ClO(2))(2)(C(5)H(6)N(2))(2)], lies about an inversion centre and the Ag atom is three-coordinated by two O atoms and one N atom from three different ligands. The 4-chlorobenzoate anion acts as a monodonor ligand, bridging two inversion-related Ag atoms of the compound into a dimer. There are weak intermolecular N-H.O hydrogen bonds in the structure.