Abstarct

Electrolytic conductivities of mixed ligand complex of Ni(II) in binary mixtures of methanol and water have been measured at 288.15-308.15 K. The limiting molar conductances (o) and the ion association constants (KA) of the electrolytes have been evaluated by analysis of the conductance data using the Lee and Wheaton conductivity equation. Thermodynamics of the association processes have also been studied and the coulombic forces are found to play a major role in the association processes. Walden product (oo) have also been calculated for each solvent composition. A linear relationship was found to exist between the logarithm of the association constant (log KA) and the reciproced of the dielectric constant (1/D) of the medium which indicate the tendency of the association of ions.

Keywords

Export bibliographic record

Choose an application

• Reference Manager
• EndNote
• BibTex

Abstarct

In this research the complex [Bis(1,10)-phenanthroline) nitratolead (II)] nitrate was prepared and the adsorption of the complex on (activated carbon, zeolite and mixture of them) was studied in equal weights under various conditions such as: temperature, contact time, pH and the change in the weights of adsorbents. With respect to activated carbon, the adsorption quantity was increased at: (30-50)C0 and (60-90) min, the suitable weight of activated carbon for adsorption was (0.15)g at pH (9). Zeolite, the adsorption quantity was increased at the temp. reached (50)C0 in a contact time lower than (90) min at a critical weight (0.3)g and pH(9). Finally when both adsorbents were mixed, the adsorption quantity was increased at temp. reached (50)C0 with the range of time (60-90) min in a weight (0.25)g at the range of pH(5-11).

Keywords

Export bibliographic record

Choose an application

• Reference Manager
• EndNote
• BibTex

Abstarct

The complexes of Schiff base of 4-aminoantipyrine and 1,10-phenanthroline with metal ions Mn (II), Cu (II), Ni (II) and Cd (II) were prepared in ethanolic solution, these complexes were characterized by Infrared , electronic spectra, molar conductance, Atomic Absorption ,microanalysis elemental and magnetic moment measurements. From these studies the tetrahedral geometry structure for the prepared complexes were suggested.The prepared ligand of 4-aminoantipyrine was characterized by using Gc-mass spectrometer .

Keywords

Export bibliographic record

Choose an application

• Reference Manager
• EndNote
• BibTex

Abstarct

In this work, several attempts were carried out to evaluate the formation of mixed ligand complex from 1-10 phenanthroline (phen.) and dimethylglyoxime (DMG) with zinc ion. Complex formation tested using both FTIR and1H NMR techniques supported by density functional theory calculations (DFT) to investigate the mulliken charges of both free ligands and their corresponding mixed ligand complex to determine the competitive ability of each ligand toward zinc ion and to study the possibility of the synthesis of mixed ligand complex. Results obtained show that 1-10 phen. ligand binds stronger than DMG. Octahedral geometry of the complex was observed involves 2:1 mole ratio of L:M in addition to 2 mole of chloride ion.

Keywords

Export bibliographic record

Choose an application

• Reference Manager
• EndNote
• BibTex

Abstarct

The association phenomena of tetra-aqua 1,10 Phenanthroline manganese (II) Chloride in binary mixtures of methanol and water have been studied at 288 - 308 K. The parameters λo, KA and R means limiting molar conductances, ion association constants and the mean distance between ions in solution have been evaluated using Lee -Wheaton conductivity equation. The association constant obtained at different temperatures were used in determining the Thermodynamic quantities of the association reaction of M+2 ions and Cl- ions (where M is the coordination complex)The results are discussed on the basis of the solvent effect on the conductivity parameters of these complexes.

Keywords

Export bibliographic record

Choose an application

• Reference Manager
• EndNote
• BibTex

Abstarct

In this work, the ligand was obtained from the reaction of diazonium salt of naphthyl amine with 1-amino-2-naphtol-4-sulfonic acid. The bidentate ligand type (NO) donar atoms was reacted with 1,10-phenanthroline and matel salt in a 1:1:1 mole ratio to give the complexes, using NaOH as a base. Physical-chemical teqnichas were used to characteriz the prepared compounds FT-IR,U.V-Vis, fluorescence and 1HNMR spectroscopy, atomic absorption , chloride content along with conductivity and melting point measurements .Finally, thermal analysis was used to confirm the presence of coordination H2O molecule in the complexes structure. According to memtioned characterization methods, the general formula proposed for CoII ZnII, CdII and HgII complexes is [M(L)(phen)(H2O)Cl].

Keywords

Export bibliographic record

Choose an application

• Reference Manager
• EndNote
• BibTex

Abstarct

A simple spectrophotometric method for the determination of hydroxyurea has been developed. The method is based on the oxidation of hydroxyurea with iron(III) in acidic medium, and the liberated iron(II) reacts with 1,10-phenanthroline to form the orange-red chelate which has a maximum absorption at 510 nm. Beer's law is obeyed over the concentration range 5-160 μg of hydroxyurea in a final volume of 25 ml, with a molar absorptivity of 2.36×104 l.mol-1.cm-1 and Sandell's sensitivity index of 0.0032 μg.cm-2, a relative error of -2.4 to +1.6% and a relative standard deviation of ±0.32 to ±1.5%, depending on the concentration level. Interferences due to excipients have been examined. The proposed method has been applied successfully to the determination of hydroxyurea in pharmaceutical formulations (capsules).

Keywords

Export bibliographic record

Choose an application

• Reference Manager
• EndNote
• BibTex

Abstarct

Xanthatecomplexes of the general formula [M{Ag(oleylXant)2}2] (A) and [MM'(oleylXant)4] (B) were M = Copper (II), Nickel II), Cobalt (II) M' = Cadmium(II), Zinc(II). These complexes were reacted with bidentatelewis base (1,10-phenanthroline). The result of this reaction gave the complexes [M(phen)][{Ag(oleylxant)2}2] (I.A) and [M(phen)][M'(oleyl-xant)4] (I.B), which have been prepared and measured by an infrared, magnetic suscetptibility measurements, conductance measurements, electronic spectra and elemental analysis electronic absorption spectra. These data indicate gave the result that the complexes of the type (A & B) are a square planer geometry while the complexes of the type (I.A), (I.B) have an octahedral geometry.

Keywords

Export bibliographic record

Choose an application

• Reference Manager
• EndNote
• BibTex

Abstarct

Mixed Ligands transition metal ion complex of Ni(II) ion with 1,10-phenanthroline (phen) as a primary ligand and Valine as secondary ligand have been prepared. Different concentrations of complex were taken and the antifungal activities have been evaluated by ability of complex to prevent the growth diameter of three types of fungi: Aspergillus flavus, Aspergillus Niger and Pencillium.

Keywords

Export bibliographic record

Choose an application

• Reference Manager
• EndNote
• BibTex

Abstarct

Tetradentate macrocyclic ligand (L) having nitrogen and oxygen atoms was prepared by condensation of the diethyl malonate with 4-nitro phenyl hydrazine in ethanol. An ethanolic solution of ligand (L) and an ethanolic solution of 1, 10-phenanthroline were reacted with ethanolic solution of metal salts to give complexes with the general formula [M(L)(phen)]X, where L=N,N-bis(4-nitro phenyl) malonyl dihydrazide, phen= 1,10-phenanthroline and M= Cr(III), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II). The resulting product was solid, which have been characterized using FT-IR and UV-Vis spectroscopy. Elemental analysis have been performed using C.H.N and atomic absorption technique, the magnetic susceptibility and the conductivity have also, been measured. From these measurements, mixed structures of the complexes were proposed to be octahedral geometry and to study the coordination behavior and spectral.

Keywords

Export bibliographic record

Choose an application

• Reference Manager
• EndNote
• BibTex