Si-Chang Shao

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

The mononuclear title complex, [Cu(C17H14N2O3)(C5H5N)], was synthesized by the reaction of CuCl2·2H2O with N-(4-oxo-4-phenylbutan-2-ylidene)benzohydrazide (H2 L). The central CuII 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 intramolecular O—H⋯N interaction occurs.

2-[4-(4-Methoxy­phen­yl)-5-(2-pyrid­yl)-4H-1,2,4-triazol-3-yl]phenol

In the title compound, C20H16N4O2, the benzene rings of the 2-hydroxyphenyl and 4-methoxylphenyl 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, intermolecular N—H⋯O hydrogen bonds link the molecules into zigzag chains propagating in [010].

4-(3-Methylphenyl)-3,5-di-2-pyridyl-4H-1,2,4-triazole

Compound (I) is a triazole derivative (Fig. 1). Some selected bond lengths and angles are listed in Table 1. The dihedral angle between the two pyridyl rings is 71.8 (3) . The dihedral angles between the benzene ring and the two pyridyl rings (C1/C2/C3/C4/C5/N1 and C8/C9/C10/C11/C12/N4) are 72.5 (3) and 74.5 (3) , respectively. The two pyridyl rings form dihedral angles of 35.9 (3) and 36.8 (3) , respectively, with the triazole ring. The dihedral angle between the triazole ring and the benzene ring is 75.7 (3) . The pyridyl groups and the benzene ring lie in a propeller arrangement around the central 1,2,4-triazole ring, thereby minimizing the steric crowding of these rings. The crystal packing is shown in Fig. 2.

4‐(4‐Ethoxy­phen­yl)‐3,5‐di‐2‐pyridyl‐4H‐1,2,4‐triazole

In the title compound, C20H17N5O, the two pyridyl rings form dihedral angles of 30.0 (1) and 21.0 (1)° with the triazole ring, and the dihedral angle between the triazole and benzene rings is 71.4 (1)°. The crystal packing is stabilized by C—H⋯N hydrogen bonds.

4-(4-Iso­propyl­phenyl)-3,5-di-2-pyridyl-4H-1,2,4-triazole

In the title compound, C21H19N5, the pyridyl groups and the benzene ring lie in a propeller arrangement around the central 1,2,4-triazole ring, minimizing the steric effects among these rings.

Crystal structure of 4-(4-tert-butylphenyl)-3,5-bis(2-pyridyl)-1,2,4-triazole, C22H21N5

C 22 H 21 N 5 , monoclinic, P12 1 /n1 (no. 14), a = 15.348(9) A, b = 5.980(3) A, c = 20.91(1) A, β = 102.488(9)°, V= 1873.7 A 3 , Z = 4, R gt (F) = 0.048, wR ref (F 2 ) = 0.121, T= 298 K.

Crystal structure of 4-(3,4-dimethylphenyl)-3,5-bis(2-pyridyI)-1,2,4-triazole, C20H17N5

C 20 H 17 N 5 , triclinic, PI (no. 2), a = 10.006(3) A, b = 10.318(3) A, c = 10.371(3) A, a = 82.630(5)°, β = 62.925(5)°, y = 63.291(5)°, V = 847.7 A 3 , Z = 2, R gt (F) = 0.043, wR ref (F 2 ) = 0.102, T= 298 K.

Crystal structure of bis(2-aminopyrimidine)silver(I) hexafluoroarsenate bis(2-aminopyrimidine) solvate, [Ag(C4H5N3)2]AsF6 · 2C4H5N3

C 16 H 20 AgAsF 6 N 12 , triclinic, P1 (no. 2), a = 7.004(1) A, b = 8.696(2) A, c = 11.006(2) A, a = 68.95(3)°, β = 76.49(3)°, γ = 81.90(3)°, V = 607.1 A 3 , Z = 1, R gt (F) = 0.044, wR ref (F 2 ) = 0.111, T = 293 K.

4-(3,4-Di­methyl­phenyl)-3,5-di-2-pyridyl-4H-1,2,4-triazole

The title compound, C21H19N5, has been synthesized and characterized by single-crystal X-ray diffraction. The dihedral angle between the benzene and triazole rings is 123.0 (5)°. The triazole ring forms dihedral angles of 36.5 (5) and 50.1 (5)° with the two pyridyl rings.

Bis(μ-4-chloro­benzoato-κ2O:O)bis[(2-aminopyridine-κN)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.