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.

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

In the title compound, C₁₉H₁₅N₅, 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.

Bis[μ-3,5-bis(2-pyridyl)-4-(4-isopropyl­phenyl)-4H-1,2,4-triazole]disilver(I) diperchlorate acetonitrile solvate

In the centrosymmetric title compound, [Ag₂(C₂₁H₁₉N₅)₂](ClO₄)₂·CH₃CN, the N-heterocycle chelates to two Ag cations through its four Lewis basic atoms to confer a distorted square-planar environment for each metal atom. The perchlor­ate anion interacts weakly with the Ag atom at a distance exceeding 3.0 Å.

trans-Bis­[4-(4-methyl­phenyl)-3,5-di-2-pyridyl-4H-1,2,4-triazole]­diperchlorato-κ²O-copper(II)

In the title centrosymmetric mononuclear copper(II) compound, [Cu(ClO₄)₂(C₁₉H₁₅N₅)₂], the central Cu^II atom is coordinated by four N atoms from two 4-(4-methyl­phenyl)-3,5-di-2-pyridyl-4H-1,2,4-triazole ligands, and two O atoms from two perchlorate counter-ions. The coordination geometry is slightly distorted octahedral.

trans-Bis­[4-(4-methoxy­phenyl)-3,5-di-2-pyridyl-4H-1,2,4-triazole-κN¹]­di­thio­cyanato­cobalt(II)

In the title centrosymmetric mononuclear cobalt(II) compound, [Co(NCS)₂(C₁₉H₁₅N₅O)₂], the central Co^II atom is coordinated by four N atoms from two 4-(4-methoxy­phenyl)-3,5-di-2-pyridyl-4H-1,2,4-triazole ligands and two N atoms from two thio­cyanate counter-ions. The coordination geometry is slightly distorted octahedral.

3,4-Dichloro­benzaldehyde (2-hydroxybenzo­yl)hydrazone

The mol­ecule of the title compound, C₁₄H₁₀Cl₂N₂O₂, is roughly planar and displays a trans configuration with respect to the C=N double bond. The dihedral angle between the two benzene rings is 14.5 (2)°. The compound adopts a chain structure which is stabilized by inter­molecular O—H...O hydrogen bonds.

3,5-Dichloro-N-(4-fluoro­benzyl­idene)aniline

In the title compound, C₁₃H₈C_l2FN, the central C=N bond length is 1.2699 (18) Å and the bond length between the C atom of the aromatic ring and the C atom of the imine group is 1.4644 (19) Å. This arrangement corresponds to a conjugated C=N moiety.

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.