Ahmed N. Al-Hakimi

Ibb University · Department of Chemistry

Nanocomposite electrolyte samples, which composed of PVA/CMC blend with selenium nanoparticles (Se NPs), were prepared by a solution cast method. The structure of the samples was analyzed using XRD and FTIR, which confirmed the interactions between PVA/CMC blend and Se NPs. Also, the decreases in the value of optical energy gaps confirm the dispers...

A series of twelve metal complexes with 2-hydroxy-N'-3-(hydroxyimino)butan-2-ylidene) benzohydrazide ligand was synthesized and characterized using elemental analyses, IR, NMR, Mass, and UV-Visible spectra. The ligand behaves either as neutral bidentate, monobasic tridentate, monobasic dibasic tetradentate ligand bonded covalenacy via deprotonated...

Novel 13 mononuclear complexes derived from 3‐(2‐(2,4,6‐trichlorophenyl) hydrazono) butan‐2‐one oxime with various molar ratio, geometry and different mode of interaction were prepared using transition metal Cd²⁺, Zn²⁺, Cu²⁺, Ni²⁺, Co²⁺, Fe³⁺, Mn²⁺, and VO²⁺. The structure of these compounds was investigated physically, analytically, and spectropho...

(E)-1-((((1H-benzo[d]imidazol-2-yl)methyl)imino)methyl)naphthalen-2-ol, ligand was synthesized by condensation of (1H-benzo[d]imidazol-2-yl) methanamine, with 2-hydroxynaphthaldehyde. The ligand and the metal complexes were characterized by various spectroscopic techniques. Interpretation of spectra confirmed that the ligand adopted either a neutra...

Mononuclear Mn²⁺ and Cu²⁺, ‐ VO²⁺, Co²⁺, Ni²⁺, ‐ and Zn²⁺ complexes of a synthetic novel hydrazone containing a quinoline moiety were prepared. The composition and structure of the prepared compounds were elucidated by spectral and analytical techniques. The results reveal that all complexes were formed in 1:1 mole ratio except Mn²⁺ and Cu²⁺ comple...

Quinoline-2-caboxyaldehyde thiosemicarbazone (HL1) and quinoline -2-caboxyaldehyde N-dimethyl thiosemicarbazone (HL2) metal complexes were prepared and characterized using analytical and spectroscopic techniques. The measurements showed that ligands behave as monovalent or neutral tridentate ligands bonding via azomethine, quinoline ring nitrogen a...

Mononuclear and binuclear metal complexes of hydrazone oxime resulted from the condensation of acetohydrazide and pyridyl hydrazide with 3-(hydroxyimino) butan-2-one were prepared. All compounds were characterized using elemental, spectral and thermal analyses, as well as magnetic moment and molar conductance measurements. The ligands acted as neut...

Novel azo-acetohydrazide complexes of Zn²⁺, Cu²⁺, Ni²⁺, Co²⁺, Mn²⁺, Fe³⁺, Ru³⁺, VO²⁺ and UO2²⁺ with 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 c...

A series of metal(II) complexes with a novel thiosemicarbazone Schiff base was synthesized. The Schiff base and its metal complexes were studied via (1 H-, 13 C-, 2D-NMR, FT-IR, UV-Vis and ESR) spectral techniques; conductivity and magnetic moments measurements; elemental and thermal analyses. The ligand found to bind the metal ions via NS donor si...

A series of twelve metal complexes with 2-hydroxy-N'-3-(hydroxyimino)butan-2-ylidene) benzohydrazide ligand was synthesized and characterized using elemental analyses, IR, NMR, Mass, and UV-Visible spectra. The ligand behaves either as neutral bidentate, monobasic tridentate, monobasic dibasic tetradentate ligand bonded covalenacy via deprotonated...

A SERIES of thirteen metal complexes was synthesized by reaction a new acetohydrazide oxime ligand with some metal ions (Cu²⁺, Ni²⁺, Co²⁺, Mn²⁺, Fe³⁺, Zn²⁺, Ru³⁺, UO2²⁺ and VO3⁻). The ligand, N'-((3-(hydroxyimino) butan-2-ylidene)-2-(phenylamino)aceto-hydrazide was prepared by refluxing an equimolar amount of phenyl amino acetohydrazide with 2,3-bu...

New metal complexes of Co(II), Cu(II), Ni(II), Zn(II), Mn(II), Fe(III), Ru(III), UO2(II), and VO(II) with the Schiff base, 2-(5-((2-chlorophenyl)diazenyl)-2-hydroxy- benzylidene) hydrazine-carbothioamide (H2L) have been prepared and characterized by elemental and thermal analyses, FT-IR, UV–Vis, mass spectra, 1H-NMR, and ESR as well as conductivity...

A new series of metal complexes of N-(5-(4-chlorophenyl)diazenyl)-2-hydroxybenzylidene)-2-hydroxybenzo-hydrazide (H 3 L) have been synthesized and characterized by elemental, 1 H-NMR, IR, UV-Vis., ESR, magnetic, thermal analyses (TG) and conductivity measurements. The spectral data show that the ligand behaves as a neutral bidentate, (2) and (4-7),...

Novel chromium(III), manganese(II), iron(III), cobalt(II), nickel(II), copper(II), ruthenium(III), and zirconyl(II) complexes of N 1,N 2-bis(3-((3-hydroxynaphthal en-2-yl)methylene-amino)propyl) phthalamide (H 4L, 1) have been synthesized and characterized by elemental, physical, and spectral analyses. The spectral data showed that the ligand behav...

VO(II), ZrO(II), Hf(IV), UO2(II), Sn(II), V(V)O3, Ru(III), Cd(II), Ho(III) and Yb(III) complexes of N'-(2-hydroxybenzyl)-2-(phenylamino) acetohydrazide (H2L1, 1) and N'-((3-hydroxy-naphthalen-2- yl)methylene)-2-(phenylam ino)-acetohydrazide (H2L2, 13) have been synthesized and characterized by elemental analyses, 1H NMR, IR, UV-Vis, conductance, th...

New series of Mn(II), Ni(II), Co(II), Cu(II) and Zn(II) of the 2-(benzothiazol-2-yl)-N'-(2,5-dihydroxybenzylidene) acetohydrazide have been synthesized and characterized by elemental analysis, IR, UV-vis, 1H-NMR, mass and ESR spectra, magnetic susceptibility and molar conductivity measurements. The spectral data and magnetic measurements of the com...

Samples of general formulae (AgI)4−2x(CdI2)xKI and (AgI)4−x(CuI)xKI, x = 0–0.4, have been prepared and studied by conductivity measurements, powder X-ray diffraction and DSC techniques. Room temperature XRD reveals the presence of the orthorhombic K2AgI3 as the major component in the system. DSC traces show endothermic peaks in the temperature rang...

The kinetics of oxidation of four aliphatic alcohols in acidic aqueous and micellar media were investigated. The reaction was found to be first-order with respect to both alcohol and oxidant. Pseudo-first-order kinetics were found to be perfectly applicable with ethanol, 1-propanol and 2-propanol while deviation was observed at intermediate stages...

Symmetric and unsymmetric copper(I)/(II) binary and ternary complexes have been synthesized and characterized by elemental analyses, infrared (IR) and electronic spectra, conductivity, differential thermal analysis (DTA), magnetic susceptibility,X-ray diffraction and electron spin resonance (ESR) spectra. The spectral analysis showed that the ligan...

A series of Ni(II), Co(II), Cu(II), Mn(II), Zn(II), Zr(IV), Fe(III), Ru(III), La(III), Hf(IV) and U(VI) complexes of 2-(p-toluidino)-N'-(3-oxo-1,3-diphenylpropylidene) acetohydrazide (H2L) have been synthesised and characterised by elemental and thermal analyses (DTA, TG), molar conductances, magnetic moments, IR, 1H NMR, UV-Vis spectra and ESR mea...

A series of Ni(II), Co(II), Cu(II), Mn(II), Zn(II), Zr(IV), Fe(III), Ru(III), La(III), Hf(IV) and U(VI) complexes of 2-(p-toluidino)-N'-(3-oxo-1,3-diphenylpropylidene) acetohydrazide (H2L) have been synthesised and characterised by elemental and thermal analyses (DTA, TG), molar conductances, magnetic moments, IR, ¹H NMR, UV-Vis spectra and ESR mea...

A new series of mono and binuclear Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), La(III), Ru(III), Hf(IV), ZrO(II) and UO2(II) complexes of phenylaminodibenzoylhydrazone have been synthesized and characterized by elementals analyses, IR UV–vis spectra, magnetic moments, conductances, thermal analyses (DTA and TGA) and electron spin resonance (ES...

A series of Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), La(III), Ru(III), Hf(IV), Zr(IV) and U(VI) complexes of phenylamino acetoacetylacetone hydrazone have been synthesized and characterized by elemental analyses, IR, UV-Vis, magnetic moments, conductances, thermal analyses (DTA and TGA) and ESR measurements. The IR data show that the ligand...

Residues of khat (Catha edulis Forskal) leaves in the soil showed an inhibitory effect on the dry mass, pectin and cellulose of wheat shoots and roots and cell wall-associated proteins of roots. The dry mass of shoots and roots significantly reduced and the reduction in roots was greater than in shoots. On the other hand, the contents of hemicellul...

MnII, FeIII, CoII, NiII, CuII, ZnII, LaIII, RuIII, HfIV, ZrIV and UVI complexes of 4-methylphenylamino acetoacetylacetone hydrazone have been synthesized and characterized by elementals analyses, i.r., u.v.–vis. spectra, magnetic moments, conductances, thermal analyses (d.t.a and t.g.a) and e.s.r measurements. The i.r. data show that, the ligand be...

The effect of foliar application of kinetin on the growth and some physiological processes of pea plants growing in soil supplemented with 25 or 50μM Cd were studied. Cadmium treatment inhibited the growth rate, chlorophyll (Chl) content, net photosynthesis (PN), content of soluble sugars and free amino acids of either shoots or roots. The applicat...

The rise of NaCl level and drought treatment, generally, exhibited an inhibitory effect on the growth rate, leaf area and transpiration rate of wheat seedlings. The water content of either shoots or roots was mostly unchanged except in shoots of 70% and roots of 30% droughted plant, where it decreased at increased salinity. On the contrary, the chl...

The interactive effects of salinity stress (40, 80, 120 and 160 mM NaCl) and ascorbic acid (0.6 mM), thiamin (0.3 mM) or sodium salicylate (0.6 mM) were studied in wheat (Triticum aestivum L.). The contents of cellulose, lignin of either shoots or roots, pectin of root and soluble sugars of shoots were lowered with the rise of NaCl concentration. O...