Synthsis and structural characterization of new metal complexes and mixed ligand complexes of 2-n-(3, 4-dihydroxy benzylidene)‎ benzothiazole

Abstract EN

The new Schiff base 2-N-(3, 4-dihyroxy benzylidene) benzothiazole (H2L1) was prepeared from reaction of 2-aminobenzothiazol (2-ABT)and 3, 4- dihdroxy benzaldehyde.

Metal complexes of the new ligand with metal ions Co(II), Ni(II), Cu (II), Pd (II), P t(IV), and Ru (III) were prepared by reacting H2L1.

(2 mmole) with the metal ions (1mmole) in presence and absence of triethylamine (Et3N,2mmole) in ethanol .

Mixed ligand complexes (ML'LI ) were synthesised by reacting H2LI and other ligands L' acetylacetone, (acac).

ethylene diamine (en), 2, 2- bipyridyl (bipy), and the Schiff base HLII that has been already prepared from 2-ABT and salicylaldehyde, with metal ions and ET3N in a molar ratio of 1 : 1 : 1 : 2, respectively in ethanol.

Structures of the new compounds were characterised by elemental and thermal analyses as well as i.r and u.v- visible spectra.

The magnetic properties and electrical conductivities of metal complexes were also determined .

Some complexes exhibted biological activities against two types of pathogenic bacteria.