Synthesis, characterization and bioactivity ¬¬¬¬Zn2+, Cu2+, Ni2+, Co2+, Mn2+, Fe3+, Ru3+, VO2+ and UO22+ complexes of 2-hydroxy-5-((4-nitrophenyl)diazenyl)benzylidene)-2-(p-tolyl- amino)acetohydrazide

Abstract

ABSTRACT. Novel azo-acetohydrazide complexes ofwith 2-hydroxy-5-((4-nitrophenyl)diazenyl)benzylidene)-2-(p-tolylamino)acetohydrazide have been prepared. All the compounds were analytically and spectroscopically characterized by various techniques. The data of molar conductance indicated the prepared complexes are nonelectrolyte in nature except complexes (10) and (11). The spectroscopic data point out that the behavior of ligand towards metal ions are neutral or monobasic bidentate, and dibasic tridentate ligand linked to the metal ions through oxygen atom of ketonic or enolic carbonyl group, azomethine nitrogen atom and/or deprotonated phenolic group forming either octahedral or tetragonally distorted octahedral geometry. X-ray powder diffraction analysis of complexes (2) and (3) indicate that the complexes are crystalline in nature and have monoclinic structures. The microbicides activities of all compounds evaluated by well diffusion method versus Escherichia coli and Aspergillus niger at different concentration. The bioactivities data elucidated that as the concentration of the tested solutions increases the activities increase.

Synthesis and Characterization of VO2+, Co2+, Ni2+, Cu2+ and Zn2+ Complexes of a Schiff base ligand derived from ethyl 2‐amino‐6‐ethyl‐4,5,6,7‐tetrahydrothieno[2,3‐c]pyridine‐3‐carboxylate and their Investigation as fungicide Agents

“…Due to the above mentioned applications of Schiff bases and in extension of group preceding work , on the synthesizing of biologically active metal complexes . This work devoted to the preparation of a novel Schiff base ligand, Ethyl 6‐ethyl −2 ‐(2‐ hydroxyl‐benzylideneamino)‐4,5,6,7‐tetrahydrothieno[2,3‐c]pyridine‐3‐carboxylate and its complexes with VO 2+ , Co 2+ , Ni 2+ , Cu 2+ , and Zn 2+ .…”

Synthesis, Spectral Characterization and Antimicrobial Studies of Transition Metal Complexes of Benzothiazole Based Schiff Bases

“…This process further increases the lipophilic nature of the central metal atom, which subsequently favours its permeation through the lipid layer of the micro-organism [39,40] more efficiently thus destroying them more aggressively. In addition to this, many other factors like nature of the ligand, solubility, dipole moment, conductivity and geometry, which are influenced by the metal ion may be responsible for the antimicrobial activities of these metal complexes [41,42].…”

Pyrimidine hydrazide ligand and its metal complexes: synthesis, ‎characterization, and antimicrobial activities

“…5 (2023) nm 𝜋→𝜋 * , 310 nm n →𝜋 * and a broad band at 666 nm for 4 T1g(F)→ 4 T2g(F) transition (48). The magnetic moment of the Ni(II) complex is 2.80 B.M which indicates octahedral geometry (49,50), this complex shows three absorption spectra bands at 265 nm 𝜋→𝜋 * , 348 nm n →𝜋 * , and 417 nm for 3 A2g(F) → 3 T1g(F) transition (51). The Cu (II) complex magnetic moment is 1.…”