عنوان المقالة:تحضير وتشخيص وفعالية بايولوجية لمعقدات الكوبلت والكادميوم المشتقة من قواعد شف الحلقية Co(II) and Cd(II) Complexes Derived from Heterocyclic Schiff-Bases: Synthesis, Structural Characterisation, and Biological Activity
رياض محمود احمد/ انعام اسماعيل يوسف/ محمد جابر الجبوري
English Authors
Riyadh M. Ahmed, Enaam I. Yousif, and Mohamad J. Al-Jeboori
Abstract
New monomeric cobalt and cadmium complexes with Schiff-bases, namely, N-[(E)-(3-hydroxy-4-methoxyphenyl)methylidene]
furan-2-carbohydrazide (L1) and N-[(E)-(3-hydroxy-4-methoxyphenyl)methylidene]thiophene-2-carbohydrazide (L2) are
reported. Schiff-base ligands L1 and L2 were derived from condensation of 3-hydroxy-4-methoxybenzaldehyde (iso-vanillin) with
furan-2-carboxylic acid hydrazide and thiophene-2-carboxylic acid hydrazide, respectively. Complexes of the general formula
[M(L)2]Cl2 (where M = Co(II) or Cd(II), L = L1 or L2) have been obtained from the reaction of the corresponding metal chloride
with the ligands.The ligands and their metal complexes were characterised by spectroscopic methods (FTIR, UV-Vis, 1H, and 13C
NMR spectra), elemental analysis, metal content, magnetic measurement, and conductance. These studies revealed the formation
of four-coordinate complexes in which the geometry about metal ion is tetrahedral. Biological activity of the ligands and their
metal complexes against gram positive bacterial strain Bacillus (G+) and gram negative bacteria Pseudomonas (G−) revealed that
the metal complexes become less resistive to the microbial activities as compared to the free ligands.
رياض محمود احمد | Riyadh Mahmood Ahmed | 11978