Dichlorido(4′-phenyl-2,2′:6′,2′′-ter­pyridyl)zinc

The title compound, [ZnCl₂(C₂₁H₁₅N₃)], was obtained from the reaction of ZnCl₂·4H₂O with 4′-phenyl­terpyridine (L) and disodium 2,6-dipicolinate. The Zn²⁺ cation is ligated by the N atoms of the tridentate L ligand and two chloride anions, forming a ZnN₃Cl₂ polyhedron with a distorted trigonal–bipyramidal coordination geometry. In the crystal, nonclassical C—H...Cl hydrogen bonds are observed.

[5-(Pyridin-2-yl)-1H-tetra­zole-κ²N⁴,N⁵]bis(triphenyl­phosphane-κP)copper(I) tetra­fluoridoborate

In the title Cu^I compound, [Cu(C₆H₅N₅)(C₁₈H₁₅P)₂]BF₄, the Cu^I cation is N,N′-chelated by a 5-(pyridin-2-yl)-1H-tetra­zole ligand and coordinated by two triphenyl­phosphane ligands in a distorted tetra­hedral geometry. The tetra­zole and pyridine rings are essentially coplanar [dihedral angle = 4.1 (3)°]. The tetra­fluoridoborate anion links to the complex cation via an N—H...F hydrogen bond.

N-{2-[2-(2-Cyano-4,6-di­nitro­phen­yl)diazen­yl]-5-(diethyl­amino)phen­yl}acetamide

The title compound, C₁₉H₁₉N₇O₅, exhibits substitutional disorder of the ortho-nitro and cyano groups, with site-occupancy factors of 0.686 (7):0.314 (7). The two aromatic rings are essentially coplanar, with a dihedral angle of 6.6 (5)°. In the diethyl­amino group, the two ethyl groups lie on the same side of the amino­benzene plane. An intra­molecular N—H...N hydrogen bond links the amino and diazenyl groups.