No abstract

A new tetraoxime ligand, (2E, 3E, 9E, 10E)-1, 4, 8, 11-tetraazacyclotetradecane-2, 3, 9, 10-tetrone tetraoxime has been prepared by the template condensation of 1,3-propanediamine and cyanogen-di-N-oxide, obtained by treating (E, E)-dichloroglyoxime in CH 2 Cl 2 with Na 2 CO 3 at )10°C. The coordination chain polymers {[(pnngH 2 ) 2 Ni] n (5) and [(pncgH 2 ) 2 Cu] n (6)} of two transition metal ions, [Ni(II) and Cu(II)] with the vic-dioxime ligand have been prepared. The oxime ligand acts as a polydentate ligand bending through nitrogen atoms in the presence of a base, as do most of the vic-dioximes. In the complexes, the chloride ions coordinate to the nickel and copper ions. The structures of these novel vic-dioxime compounds are proposed on the basis of the elemental analyses, molar conductance data, i.r., and U.v.)visible are presented. Elemental analyses indicate a ligand metal ratio of 1:1 in the coordination polymers. Conductivity measurements have shown that mono-and polynuclear complexes are non-electrolytes. In addition, anti-microbial activities of the compounds have been investigated.

No abstract

No abstract

Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.003 Å; R factor = 0.062; wR factor = 0.164; data-to-parameter ratio = 22.8.The title azo-azomethine dye, C 19 H 15 N 3 O, was synthesized by the reaction of 2-hydroxy-5-[(E)-phenyldiazenyl]benzaldehyde with aniline. With respect to the azo double bond, the two attached benzene rings display a trans configuration with a C-N N-C torsion angle of 178.5 (3) . The structure is stabilized by intramolecular O-HÁ Á ÁN and intermolecular C-HÁ Á ÁO hydrogen bonds.