Table of Contents - Volume 3 Number 1

New Co(II), Ni (II), Cu (II), Zn(II), Mn (II) and Fe (III) complexes of Schiff bases have been prepared and characterized by elemental analysis, IR, Uv - vis. atomic abscrption spectra, conductometric measurements and thermogravimetric analysis. The thermal decompositian of the complexes follows first order, kinetics and thermodynamic parameters of the decomposition were calculated.

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In order to investigate the kinetic of the diffusion of a liquid in a polymer matrix, the study of the diffusion oF the n-heptane in ethylene vinyl acetate is carried out. The polymer considered has a spherical shape. The kinetics of absorption and desorption of the Iiquid are carried out experimentally by weighing the bead at successive times. Thus the experimental curve is compared to the calculated curves using the analytical and numerical solutions. Two numerical solutions, based on finite differences are suggested:
1. Numerical solution for the bead without swelling
2. Numerical solution for bead with swelling and subsequent change in dimensions.

The second purpose seems being the better and give a good agreement with the experience since the diffusivity (experimental and calculated) are of the same magnitude.

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A compound CuNiTiO4 is prepared by solid diffusion method in the laboratory using standard chemical crystallographic of CuNiTiO₄. The magnetic susceptibility of compound is measured by Gauy’s method. The molar susceptibility is obtained with curie molar constant with respect to temperature. The Magnetic properties are studied under which the variation of Magnetic susceptibility with respect to temperature. The compound is found to be paramagnetic at room temperature. The paramagnetic behaviour is studied by plotting 1/Κ_m, vs temperature.

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The formation of ternary complexes of metal-guanosine thymidine, uridine or adenosine have been studied by potentiometrically at 15°, 25°, 35° and 45°C and 0.1 M (KNO3) ionic strength. The metal ions studied are Cu(II), Ni(II), Co(II), Zn(II), Mg(II) and Ca(II). The thermodynamic parameters, enthalpy and entropy changes for these ternary systems are calculated. The ΔΔH values are highly negative and ΔΔS are
negative for these systems. The exothermic enthalpy for the mixed nucleoside complexes may be attributed to the energy of stacking interaction in these systems.

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Polyamide [1,3-dicarboxymethoxybenzene and proplenediamine] complexes with Pb2+, Fe3+ and Cu2+ were prepared by melt condensation of bis-1,3-[DCMB] and [PD] and charaterized by elemental and thermal analysis as well as different spectroscopic techniques. T he data gathered showed that polyaminde, ligand coordinates with metal ions in a bidentate manner through NN donation. The metal ions are surrounded by coordinated water molecules and anions so as to establish the octahedral geometry.

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In present paper a basic theory has been developed for calculation the leading quantum correction to the thermo dynamic properties of the two-dirnensional fluid hard disc. Theoretical efforts have been made to explain the-structural and thermodynamical properties of two- dimensional fluids. Although a strictly two-dimensional picture has been used in predicting the properties of absorbed film. It is required to study about hard-disc system in framing the theory of two-dimensional fluids. It is quite natural to study model fluids with only hard cores and no inter atomic attractions. The simulation results for RDF of the hard discs for same values of density solution².

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The charge- transfer (CT) complex based on protopine with electron acceptor iodine has been synthesized. The conductivity increases by several orders of magnitude and the activation energy decreases on formation of CT complex. Solidstate battery of configuration Zn protopine- I₂ / graphite has been developed using the CT complex as the cathodic material. The open- circuit voltage af the cell increases with the increase in temperature. The high open- circuit voltage and battery parameters indicate that the CT complex of natural occurring protopine can be used in fabrication of selid- state batteries.

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This study resulted from the researcher’s awareness of scarcity of fatty acids in chemical laboratories and industries in Nigeria despite the fact that we have many Agricultural products containing these acids, for example, palm oil in which Nigeria is one of the leading producers in the world before the oil boom can serve as a source of saturated and unsaturated fatty acids. The oil was bleached using activated charcoal; the bleached oil was saponified and acidified to obtain the mixture of fatty acids. Out of 100g, 79g of bleached oil was obtained. The unsaturated fatty acids collected from 3g of mixture was 1.56g (52.0%) and that of saturated was 1.34g (44.6%). This shows that palm oil can serve as a drying as well as non-drying oils.

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The stability constant of the binary 1:1 and 1:2 metal thymidine complexes have been determined from potentiometric titrations at 15°, 25°, 35° and 45°C and 0.1 M (KNO3) ionic strength. The metal ions studied are Cu(II), Ni(II), Co(II), Zn(II), Mg(II) and Ca(II). The stability constants of 1:2 metal thymidine are lower than the corresponding 1:1 metal thymidine system. The Δ log K for 1:2 metal thymidine are negative, as expected from statistical considerations. The enthalpy changes for 1:2 complex formation are less negative i.e. less exothermic than the corresponding 1:1 systems. The entropies are however more positive for 1:2 system. This is the normal trend for neutral ligands where the enthalpy is more favorable for 1:1 complexes (exothermic) as compared to 1:2 complexes.

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Production of nickel layers with consistently quality requires precise control and analytical methods. Aside from the inorganic components of the electrolyte, the organic additives are of critical importance for the properties of the nickel deposits produced. We have investigated the electrochemical behaviour of some of these additives by voltammetric methods as CV, DPP methods on electroplating nickel Watt’s bath. We have observed that wetting agent is not electroactive, but it shifts the peak potential of nickel ions towards a more negative potential. Other
additives as purifier, brightening and ductility enhancing agents are electroactives, but in more negative than nickel ions.

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Apparently reversible and dissociation of small, metastable primary J- aggregate particles and dimeric particles of a phanchromatic carbocyanine dye I in moderatly dilute aqueous methanol solutions containing electrolytes (Kcl and Na2SO4) have been studied spectrophotometrically. Association numbers, n, for the particles were estimated from mass action relation between the concentration of free and aggregated dye molecules. Particle sizes, were also estimated from spectral absorption line widths. The thermodynamic properties like equilibrium
constant and free energy were calculated. The dye can be efficiently used in photography and in optical memory systems.

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In this present paper an attempt has been made primarily concerned with the diffraction effects of quantum theory of liquids. The hard sphere system is treated as a reference in framing the theory of liquid. We are concerned with the evaluation of the radial distribution function of the hard sphere fluid in the semi classical limit. When quantum effects are small, then the properties of fluid are analysed in power of Planck’s constant h. Some methods have been adopted to investigate the effects of quantum mechanics on the structural and thermodynamic properties of a dense hard sphere at higher temperature. It is found that the contribution of the higher order corrections increases with density. Other theoretical approach has been also taken to investigate the properties of simple fluids through an integral equation. We critically discuss the integral equation perturbation theory and the effective pair potential for the free energy and correlation function.

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Clay minerals containing amended soil samples were collected at upper surface from the GIDC, Vapi near Heranba and GIDC, Ankaleshwar near GIL. The samples were precipitated & concentrated by centrifuge method for the extraction of clay X-Ray Diffraction (XRD) and Scan Electron Microscopy (SEM) analysis were carried out for these clay seperates quartz (Silica), illite and kaolinite minerals while smectite was found in traces.

Beside the above analysis we have also carried out physico-chemical analysis of the same soil sample.

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Co-ordination compounds of chloropropamide (CPM) N-Propyl-N-(Pchlorobenzene sulphonyl) urea (trade name, diabinese) and gliclazide (GCZ) 1 - (3 - azabicyclo [3,3,0] oct - 3yl) - 3 - (P - totyl sulphonyl) urea. (trade name, diamicron) are oral hypoglycemic were synthesize with iron(II) and cobalt(II), isolated in pure powderd form, yields are substantial. Stoichiometry suggest 1:1:1 ratio between drugs and metal ion. Analytical data of the complexes agrees with the compositions are C10H12ClN2O3S-Fe-C15H20N3O3S 2H2O and C10H12ClN2O3S-Co- C15H20N3O3S.2H2O The general structure assigned to these complexes is supported by infra-red and electronic spectral studies.

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In the present paper, we describe the synthesis and characterization of metal complexes of Hg (II) and Ag (I) using Schiff base ligand salicyldehydefurosemide. Furosemide (FSD) is a diuretic drug and it is used to increase the rate of urination through kidneys. Analytical data and stoichiometry suggest ligand metal ratio as 2:1 for Hg complex and 1 : 1 for Ag complex. The structure assigned to the complexes, synthesized via Schiff base formation is supported by infra-red spectral studies.

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