Zhao‐Di Liu

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].

[N,N′-Bis(2-hydroxy­naphthylmethenyl­imino)-1,2-ethanediaminato]­cobalt(II)

The title compound, [Co(C24H18N2O2)], is mononuclear. The CoII atom is coordinated by two N atoms and two O atoms from a bis–Schiff base ligand in a slightly distorted square-planar geometry.

Bis­[tetraamminezinc(II)] tetrapicrate trihydrate

In the title compound, [Zn(NH3)4](C6H2N3O7)4·3H2O, the ZnII atom is coordinated by four ammine N atoms in a slightly distorted tetrahedron. The phenolate and nitro O atoms of the picrate ions act as acceptors in N—H⋯O and O—H⋯O hydrogen bonds, giving a three-dimensional network.

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.

catena-Poly­[1,4-diazo­niabicyclo­[2.2.2]­octane [silver(I)-tri-μ-thio­cyanato-κ6S:S]]

The title compound, [(C6H14N2)[Ag(NCS)3]]n, is a polymeric silver(I) complex. The Ag(I) atom is hexacoordinated by the S atoms of six thiocyanate anions, with each thiocyanate S atom acting in a bridging mode to link the Ag atoms together. The unique Ag(I) atom lies at a cell origin and has crystallographically imposed 3 symmetry. The diazonia[2.2.2]octane molecule lies about a site with 6 imposed symmetry with the unique N atom on a threefold axis. The S and N atoms of the thiocyanate ligands sit on a mirror plane and a threefold axis, respectively. The crystal structure consists of one-dimensional chains, which are stabilized by N-H...N hydrogen bonds to form a three-dimensional network.