Bis­(di-2-pyridyl­methanediol-κ³N,O,N′)­nickel(II) dilactate

Di-2-pyridyl ketone reacts with nickel(II) dilactate in water to form the title compound, [Ni(C₁₁H₁₀N₂O₂)₂](C₃H₅O₃)₂, whose Ni atom is N,O,N′-chelated by the ketals in an octahedral environment. The cation interacts with the two anions through extensive hydrogen bonds to furnish a helical chain motif that runs along the b axis.

A C-centered monoclinic modification of bis­(di-2-pyridyl­methanediol-κ³N,O,N′)copper(II) di­acetate tetrahydrate

Di-2-pyridyl ketone undergoes hydro­lysis when reacted with copper(II) acetate to form the title compound, [Cu(C₁₁H₁₀N₂O₂)₂](C₂H₃O₂)₂·4H₂O. The crystal structure consists of octahedral cations that are linked to the anions and to the uncoordinated water molecules, giving rise to a three-dimensional network structure. This C-centered monoclinic modification is less compact than the primitive monoclinic modification reported by Reinoso et al. [(2003). Acta Cryst. E59, m548–m550]. The Cu atom is located at a center of inversion.

2-(3-Benzyl­oxy-4-methoxy­phenyl)-5-phenyl-1,3,4-oxa­diazo­le

The title compound, C₂₂H₁₈N₂O₃, was synthesized by oxidation of benzoic acid (3-benzyl­oxy-4-methoxy­benzyl­idene)­hy­dra­zide with bis­(tri­fluoro­acetoxy)­iodo­benzene in chloro­form at room temperature.

Poly­[bis(μ-3-pyridine­carboxyl­ato-κ³N,O:O′)­cadmium(II)]

The title compound, [Cd(C₆H₄NO₂)₂]_n, is a two-dimensional coordination polymer, which consists of Cd^II atoms and bridging nicotinate anions. The Cd atom is coordinated in a highly distorted CdO₄N₂ octahedron by two chelating carboxyl­ate groups and two cis pyridyl groups.

[4-(2,2-Diphenyl­vin­yl)phen­yl]diphenyl­amine n-hexane 0.25 solvate

The title compound, C₃₃H₂₅N·0.25C₆H₁₄, was synthesized via the Ullmann reaction. The dihedral angles between the planes of the phen­yl rings of the diphenyl­amine group and the plane of the central benzene ring are 109.2 (3) and 114.1 (8)°.

Tetra­aqua­bis(pyridine-3-carboxyl­ato-κN)iron(II)

Pyridine-3-carboxylic acid (nicH) reacts with iron(II) chloride tetra­hydrate in a methanol–water mixture to form the title compound, [Fe(C₆H₄NO₂)₂(H₂O)₄]. The Fe^II atom is in a slightly distorted octa­hedral coordination. The crystal structure is stabilized by O—H...O hydrogen bonds involving all the water H atoms and the carboxyl­ate groups.

N-Methyl-2-nitro-N-(4-nitro­benzo­yloxy)-1-phenyl­propan-1-amine

Two compounds were obtained via the addition of N-methyl­hydroxy­lamine to 1-phenyl-2-nitropropene. The structure of the major product, the title compound, (I), C₁₇H₁₇N₃O₆, is reported here. Both asymmetric C atoms (C1 and C2) have the same chirality, either R,R or S,S.