Digital Commons Network^™

Palladium And Platinum Complexes Of Substituted Cycloolefins, Gerald Brady Mccauley

University of the Pacific Theses and Dissertations

Much of the fundamental work on complexation of cycloolefins by platinum metals has been laid down by several workers and ranges from complexes of butadiene those of cyclododecatriene. The work here was chiefly a continuation of research on cycloolefin complexes which appear in papers by Kuljian and Frye (30,31,44). Most of this work on the complexes of cyclic seven, eight, and twelve carbon ligands was repeated here to insure a more complete laboratory background and for verification of previously reported literature data on these compounds. These compounds were used a s basis for comparison to original compounds developed in the …

Synthesis Of N-Methyl-D-Gulosamine And Methyl Ethers Of N-Methyl-D-Gulosamine, Hazrat Mohammed Noorzad

University of the Pacific Theses and Dissertations

A great variety of amino sugars has been found in antibiotics among these D-gulosamine in the striptomyces group. In the same group, .an N-methylated amino-sugar, N-methyl-L~ glucosamine has been isolated. Although N-methyl-0-gulosamine .has not been found in nature until now, its ultimate discovery would not be surprising in this context. In the present work this amino-sugar and some important derivatives are prepared for the first time, starting from D-glucosamine, a pure benzyl· 3-0-acetyl-2-benzyloxycarbonylamido-2-deoxy-~-D-glucopyranoside (X) was obtained by a series of kno~n processes. Benzyl 3-0-acetyl~-methylsulfonyl-2-deoxy-~-D-glucopyranoside (XIII) and some of its derivatives were obtaine.d from (X). An attempt was made to obtain …

Ternary Phase Diagram Determinations Concerning Potassium Electrolyte Influence On Aqueous Solutions Of Dioxane Or Tetrahydrofuran, John Albert Mcnaney

University of the Pacific Theses and Dissertations

For the graphical representation of the mutual, partial solubilities of a·ternary system, a diagram is generally employed which is based upon the equilateral triangle, whose properties are especially felicitous for this-purpose.

In this study, the phase diagrams for the following systems were determined: potassium acetate-water-dioxane, potassium acetate-water-tetrahydrofuran, potassium benzoate-water-dioxane, potassium benzoate-watertetrahydrofuran, potassium chloride-water-tetrahydrofuran, and potassium hydroxide-water-dioxane.

The systems, potassium acetate-water-dioxane and potassium hydroxidewater-dioxane, were investigated at 25° and 85°. This study indicates that they are, to a slight degree, temperature dependent. When these systems were plotted on a mole-percentage basis, it was found that both potassium compounds have about the …

The Synthesis Of Methyl-2-Acetamido-3,4,6-0-Triacetyl Alpha-D-Talosaminide, Mohammad Saleem Choudhary

University of the Pacific Theses and Dissertations

Amongst the very many different kinds of amino sugars, theones that have aroused the most interest are the 2-amino 2-deoxy hexoses which are found in such well known antibiotics as streptomycin and neomycine (2). There are so far about forty-three antibiotics which are known to contain different aminosugars (6).

Aminosugars exhibit the same properties as other reducing aldohexoses, e. g. reduction of silver and cupric salts, oxidation to hexonic acids, reduction to alcohols and formation of glycosides.

The object of this project is to synthesize methyl N-acetyl α-D-talosaminide which has previously been prepared by Jeanloz (3) following a different route. …

Anodic Dissolution Of Zinc In Potassium Nitrate, Martin E. Straumanis, J. L. Reed, William Joseph James

Materials Science and Engineering Faculty Research & Creative Works

The apparent valence of pure zinc dissolving anodically in 3% KNO₃ was determined as a function of current density, temperature, and ultrasonic agitation. The apparent valence of zinc dissolving anodically at 24°C diminishes from 2.01 ± 0.01 at low current densities to 1.86 at about 50 ma and remains fairly constant up to about 80 ma cm−2. This valence is affected to some extent by the preparation, e.g., polishing of the electrode, but is independent of its structure (mono- or polycrystal). Ultrasonic vibrations do not influence the apparent valence at high current densities. In all cases a black film …

Ferroelectric Properties Of Pbzro₃-Bifeo₃ Solid Solutions, Robert Gerson, Pen-Chu Chou, William Joseph James

Physics Faculty Research & Creative Works

Solid solutions of BiFeO and PbZrO₃ were investigated for crystallographic and dielectric properties. A new pseudocubic perovskite phase was found, which has been tentatively indexed as orthorhombic with the same unit cell as PbZrO₃ but with dielectric properties characteristic of a ferroelectric substance. The Curie point in this series of solid solutions has a minimum of about 155°C at a composition of about (PbZrO₃)_0.80 (BiFeO₃)_0.20, which at room temperature lies on the boundary between the orthorhombic antiferroelectric and the pseudocubic ferroelectric phases. This composition has a relative dielectric constant of 800 …

The Anodic Dissolution Of Cadmium, James W. Johnson, E. Deng, S. C. Lai, William Joseph James

Chemical and Biochemical Engineering Faculty Research & Creative Works

The anodic dissolution of cadmium has been studied in aqueous solutions containing Cl−, Br−, I−, Ac−, SO₄=, and NO3− ions. The normal valence (+2) was found in all solutions with the exception of NO₃−. The apparent valence (calculated) of cadmium ions in nitrate solutions varied from 1.2 to 2.0 and was found to be a function of NO₃− concentration, current density, and temperature. An anodic dissolution mechanism has been proposed involving local corrosion and disintegration of the anode which is consistent with the experimental results. © 1967, The Electrochemical Society, Inc. All rights reserved.

The Effect Of Concentration On The Viscosities Of Solutions Of Linear Flexible High Polymers, Lung Yu Chou, Jacques L. Zakin

Chemical and Biochemical Engineering Faculty Research & Creative Works

Viscosity-concentration results in the moderately concentrated range for four samples of polyisobutylene (molecular weights of 1.3 x 104 to 1.0 x 106) in cyclohexane (concentrations up to 4.7 g./dl.) and in benzene (concentrations up to 7.0 g./dl.) at 24°C. (a theta solvent) showed molecular weight and goodness of solvent dependencies similar to those reported earlier for three other polymers. For polyisobutylene, polystyrene, and a copolymer of styrene and methyl methaerylate in good solvents, viscosity-concentration data plotted as ηsp. C[η] vs. k′[η]C fit a single curve. The linear region of this curve suggests that the Huggins equation is useful to C[η] …

The Separation Of Optical Isomers By Gas Chromatography, Donald Ellis Carpenter

Masters Theses

"The purpose of this investigation was to study the separation of optical isomers by gas chromatography. An optically inactive solid support was coated with an optically active substrate. Racemic compounds were used as samples. The optically active packing materials tried were d-tartaric acid, d-diethyl tartrate, sucrose, d-camphoric acid, d-camphor-10-sulfonic acid, α -methyl-D-glucoside and L-(α)-glutamic acid.

Racemic compounds that were tried included 2-butanol, 3-methyl- 2-butanol, 2-methyl-1-butanol, 2-octanol, 2-bromooctane, 2-methoxy-octane, methyl-2-bromobutyrate, and 3-methylhexane.

It was found that racemic compounds could be separated by using an optically active material for packing in the gas chromatographic columns. Racemic 2-butanol, 3-methyl-2-butanol, and 2-methyl-1- butanol were …

An X-Ray Study Of The Lead Titanate-Bismuth Chromate System, Tsen-Tsou Shih

Masters Theses

"The lead titanate-bismuth chromate system was studied employing x-ray diffraction techniques at both room and high temperatures. Samples were prepared by sintering stoichiometric mixtures of the corresponding oxides followed by air quenching. Bismuth chromate was prepared by resintering and air quenching for four times. The results of the analyses show the structure of BiCrO₃ to be tetragonal with 8 molecules per unit cell. Solid solutions exist over the range 100 to 35 mole percent PbTiO₃ of the binary system, although small amounts of other phases are present in some regions. X-ray data at room temperature indicate the tetragonal perovskite structure …

Studies In Coprecipitation Of Trace Amounts Of Elements, Gerald Delano Schucker

Masters Theses

"A new approach to preconcentration of trace amounts of elements has been demonstrated whereby traces of metals tied up as chelates are coprecipitated on a column of solid organic material. Complete coprecipitation was found to occur within very narrow pH ranges, thereby allowing separation as well as concentration of the elements by careful adjustment of acidity and concentration of chelating agent. The separation is based on the difference in stability constants of the metal chelates. Preliminary studies with different physical forms of the carrier precipitate, indicate adsorptive processes could play a significant role in the mechanism of the column-coprecipitation process. …

Infrared Spectra And Magnetic Properties Of Fluorine Substituted Copper (Ii) Alkanoates, Jose G. Rodriguez

Masters Theses

"The purpose of this study was to prepare some selected copper(II) fluorcalkanoates, investigate their magnetic susceptibilities, study the infrared spectra of these salts and compare these properties to those of the unfluorinated copper(II) alkanoates….

The experimental data obtained indicate that the copper(II) trifluoroacetate, perfluoropropanoate and perfluorosuccinate does not form a binuclear cage structure. Copper(II) 3-(trifluoromethyl) butanoate with a magnetic moment of 1.4 should possess a binuclear case structure similar to copper( II) acetate monohydrate. The structure for copper( II) perfluoroglutarate monohydrate with a magnetic moment of 1.63 B.M. should have a structure somewhere between the two aforementioned structures"--Abstract, page ii.

The Study Of The Metal Complexes Of Alpha Aminohydroxamic Acids, Richard N. Nipe

Masters Theses

Introduction

The objectives of this investigation were to develop: 1) compounds similar to hydroxy urea, a compound known to have anti-tumor activity, 2) a method to prepare α-aminohydroxamic acids and to study the complexes of these compounds with several metal ions, 3) computer programs to determine the pK's¹ of the hydroxamic acids and the stepwise stability constants² for the ligands and several metal ions.

The values obtained for the stability constants were compared with values for the stability constants of acetohydroxamic acid and α-aminocarboxylic acids in an attempt to find which in the ligand formed bonds with the …

Host And Prophage Modifications Of Ultraviolet Induction In Salmonella Potsdam, Bela B. Toth

Loma Linda University Electronic Theses, Dissertations & Projects

In induction experiments with naturally occurring and artificially lysogenic strains of S. potsdam, cells were irradiated in buffer, transferred to complete medium, and then assayed for free phage. Irradiation was followed by half hourly samples for free phage from the growing populations of irradiated cells. For an estimation of burst sizes, the irradiated cells were diluted out to a final concentration of 1 cell per ml and distributed to tubes in 0.5 ml quantities. All assays were done by the top-layer method with streptomycin incorporated in the top-layer and SP2-str^r as the bacterial indicator. The non-lysogenic strain S. …

The Synthesis Of Pyridazines, Cinnolines, Tetrazines, Tetrazapyrenes And Related Nitrogen Heterocycles, William D. Guither

Chemistry and Chemical Biology ETDs

There are many examples of nitro-substituted aromatic compounds, and of these the compounds in the benzene series have been most extensively studied. Nitro groups attached to an aromatic ring vary in reactivity toward nucleophilic displacement. For example, when two nitro groups are ortho or para to each other, one may be substituted with varying ease depending on the other substituents present. Nitro groups which are meta to one another are generally not subject to nucleophilic displacement. The mobility or ease of displacement of a nitro group by a nucleophile may be increased by introduction of other groups into the ring, …

8th Annual Meeting Rocky Mountain Spectroscopy Conference

Rocky Mountain Conference on Magnetic Resonance

Program and abstracts from the 8th annual meeting of the Rocky Mountain Spectroscopy Conference, sponsored by the Rocky Mountain Section of the Society for Applied Spectroscopy. Held in Denver, Colorado, August 8-9, 1966.

A Method For The Determination Of Trace Metals In Carbon By Atomic Absorption Spectroscopy, Leo Francis Meyer

Master's Theses

The object of this research was to develop an accurate, rapid and economical method for determining trace amounts of metals in carbons, especially in activated carbons designed as gas adsorbents. More specifically, the investigation was directed primarily to the determination of K, Ca, and Fe in Carbons

The Application Of The Verwey-Overbeek Theory To The Relative Sediment Volume Of Kaolin-Water Dispersions, James E. Kline

Masters Theses

Introduction

This paper describes an investigation intended to: 1. observe the effect of electrolyte concentration on the stability of kaolin-water systems, 2. evaluate the relative sediment volume measurement as a tool for determining the stability of such systems, 3. assess the applicability of the Verwey-Overbeek theory of stability of lyophobic colloids for predicting the observed effects, and 4. determine if any correlation exists between the effects predicted by the theory and observed through the relative sediment volume measurement.

The relative sediment volume measurement will be shown to be dependent upon the efficiency of packing of the pigment particles, which in …

Synthesis Of A Substituted Tetrahydropyrimidopyrimidine, Jack Lee Parsons

Masters Theses

Introduction

The purpose of this research was to develop a generalized synthesis of substituted tetrahydropyrimidopyrimidines. It was also of interest to prepare related compounds for the purpose of structure determination.

We were interested in tetrahydropyrimidopyrimidines as possible folic acid antagonists.

Dimethyl Sulfoxide Oxidation Of Primary Alcohols, Carmen Vargas Zenarosa

Masters Theses

Historical

A method of selective oxidation of primary and secondary alcohols to the corresponding aldehydes and ketones has been developed recently, namely the use of dimethyl sulfoxide (DMSO) as the oxidizing agent, either alone or with dicyclohexylcarbodiimide (DCC)¹⁴, acid anhydrides¹, or alkyl chloroformates¹⁰. The negatively polarized oxygen atom of the sulfoxide group in DMSO is ideally situated for a transfer to many electron-deficient substrates. The oxygen of the alcohol coordinates with the sulfur atom of DMSO through its oxygen atom; this is followed by β-elemination of dimethyl sulfide, thereby resulting in oxidation of the …

Studies On The Preparation Of Tetrasubstituted Hydrazones, William Kao

Masters Theses

Introduction

In a recent study of the ultraviolet spectra of substituted hydrazones, it was concluded that a sterio effect existed in tetrasubstituted hydrazones that significantly hindered complete rotation about the nitrogen-nitrogen bond. Weber¹⁶ noted that di- and tri-substituted hydrazones exhibited similar spectra with three strong absorption bands at approximately 235, 300, and 340 mu. In acid solutions, the spectra of these compounds showed a marked decrease in intensity of the long wavelength band. It has been postulated that this change was a consequence of the protonation of the non-bonding electron-pair on the amino nitrogen atom, and thus correlated the …

Isolation Of A Toxic Substance From Centaurea Repens, Merton E. Sprengel

Loma Linda University Electronic Theses, Dissertations & Projects

A poisonous steroid-type compound was isolated from Centaurea repens. After extraction with absolute ethanol, removal of the solvent, addition of 2% HCl to precipitate the pigments, and filtering, the pH was adjusted to 9 with aqueous anunonia. This solution was exhaustively extracted with chloroform, evaporated to dryness, and extracted with ethyl ether.

This fraction was chromatographed on silica-gel plates, using 10:1 1,2-dichloroethane-methanol as the developer. The band at Rf 4.2 was removed and found toxic to mice. Labored, slow, gasping respiration and frequent involuntary muscular contractions became apparent within a few minutes following the intraperitoneal injection into each animal. Death …

The Cleavage Of Diborane By Tetra (Dimethylamino)Diboron And The Preparation Of Some Dihale (1, 10-Phenanthroline)Boron(Iii) Cations, Jack D. Cummins

Chemistry and Chemical Biology ETDs

Boron hydrides were first described and characterized by Stock (1). His early work has led to the proposal of about twenty new, distinctly identifiable hydrides (2). Of the proposed hydrides, it has been established that diborane-6 (B2H6), tetraborane-10 (B4H10), and nonaborane-15 (B9H15) contain bridged BH2 groups in the boron hydride framework (2,3,4,5,6,7,8,9). The proposed structures for these compounds is shown in fig. 1 (2,10).

Development, Verification, And Use Of Methods To Model Chemical And Thermal Processes Lakes Mead And Powell, Bureau Of Reclamation

Publications (WR)

PURPOSE The purpose of the proposed research is to quantify the effects that Lakes Mead and Powell have on the salinity in the Colorado River system, and to evaluate changes that cap be made to the operating system of the reservoirs (within legal/institutional constraints) to enhance salt precipitation and/or minimize evaporation within the reservoirs. The effect of any changes (i.e., selective withdrawal uses, pumped storage, etc.) on reservoir evaporation could also be evaluated with a goal of minimizing evaporation. This will be accomplished through the development of a mathematical model of the reservoirs as described below. BACKGROUND Two major problems …

Potential Neoplasm Inhibitors Ii, Ronald Lee Floyd

Master's Theses

No abstract provided.

A Study Of The Base Catalyzed Decompositions Of Azoacetates, David V. Herman

Masters Theses

Introduction

The formation of a benzyne intermediate has been shown by several investigators ^(2,5,6) to be developed in at least four different reactions; the reaction of o-dihalobenzenes with magnesium or lithium, aryl halides with strong nucleophiles, o-halobenzophenones with potassium amide in liquid ammonia, and the decomposition of benzenediazonium-2-carboxylate.⁽¹³⁾ The mechanism propsed for one of the above most relevant to the following study, the reaction of o-halobenzophenones with potassium amide in liquid ammonia, is outlined in the following sequence:

Liquid Scintillators. The Stability Of Organic Scintillator Solutes Toward Ultra-Violet Radiation. The Photooxidation Of 2, 5-Diphenyloxazole, Harold A. Mackay

Chemistry and Chemical Biology ETDs

An insight has been gained concerning the stability of organic scintillator solutes in toluene on exposure to ultraviolet light while in the presence of oxygen and water. Oxygen and water, from either solute or solvent, not only function as quenchers but may continue to react with the solute molecule via a photooxidation process. Removal of these materials from the 2, 5-diphenyloxazole toluene system resulted in a marked improvement in stability of the system on exposure to ultraviolet light. The choice of scintillator solute, in addition to water and oxygen, and the time of ultraviolet irradiation, has a pronounced effect on …

Polarographic Investigation Of Several Tetrakis 1, 3-Diketone Europium Chelates In Acetonitrile, Samuel Lee Jeanjaquet

Chemistry and Chemical Biology ETDs

This study is concerned with the polarographic behavior of several tetrakis 1, 3-diketone chelates of europium and of the 1, 3-diketone ligands in acetonitrile. Such a study should reveal the following: (a) whether the europium (III) in the complexes is reduced directly to the metal, or if reduction to europium (II) takes place followed by reduction to the metal; (b) whether ligands are released during the reduction step(s) and if so, how many; (c) whether the polarographic behavior is such that dissociation constants of the complexes or complex ions can be determined by measuring the shift in half-wave potential as …

Multiple Trace Element Assay By X-Ray Fluorescence, Richard Pierre Koshakji

Archived Theses and Dissertations

No abstract provided.

Scaling In Carbon Monoxide And Nitrogen, Jerry Goodisman

Chemistry - All Scholarship

No abstract provided.