Physical Sciences and Mathematics Commons^™

Synthesis Of Benzyl-Beta-D Alcohol For Use In Studies Of Photolytic Solvolysis Reactions, John Crest Anes

Honors Theses

This project proposes a means for determining whether certain photochemical solvolysis reactions proceed by an SN1 or SN2 type mechanism. The method uses optically active substrates to determine whether the displacement reaction occurs with racemization or retention of configuration. This paper deals with the synthesis of optically active benzyl-α-d alcohol from which various appropriate substrates required for the study can be prepared. Benzaldehyde---d is first prepared by the Stephens reduction of benzonitrile using stannous chloride and deuterium chloride. The optically active alcohol is then prepared by the reduction of thebenzaldehyde-d with optically active isobornyloxymagnesium bromide.

Potentiometric Edta Titrations Using A Bismuth Amalgam Electrode As Indicator, Wayne Michael Butler

Honors Theses

Previous work in the field of potentiometric titrations using bismuth-mercury electrodes with ethylenediaminetetraacetic acid as the titrant have been largely reproduced. The bismuth amalgam electrode has been further developed to provide ease of preparation and maintenance and through improved techniques of cleaning to eliminate electrode poisoning effects. Various titrations have been studied to determine the solution conditions necessary for maximum end point breaks, good electrode poise, and rapid and steady equilibrium of the electrode. These conditions have been adapted to make the electrode suitable for use with automatic titration equipment and for the analysis of multicomponent mixtures.

Toward A Synthesis Of Acenaphth (1,2-A) Acenaphth (1,2-A) Acenaphthene, John Isaac Gerson

Honors Theses

The purpose of this project was to synthesize acenaphth (1, 2-a) acenaphth (1, 2-a) acenaphthene. The project originally followed Letsinger's preparation of a synthetic precursor called acenaphth (1, 2-a) acenaphthylene, which was to be dibrominated, giving the cis-6b, 12b derivative. This derivative was to be reacted with naphthalene to yield the desired product; but this route was abandoned when a necessary forerunner of Letsinger's hydrocarbon called 1, 8-dibromonaphthalene was obtained in very low yield. An alternate procedure leading to Letsinger's hydrocarbon, involving the Friedel-Crafts addition of 1, 8-di (chloromethyl) - naphthalene to naphthalene, was devised, and a synthetic precursor of …

Electrogeneration Of Molybdate Ion, Michael John Milano

Honors Theses

The electrogeneration of molybdate ion (MoO4-2) for possible use in a coulometric determination of thorium or lead has been investigated. Constant current electrolyses were used to study the oxidation of molybdenum to molybdate. It was found that molybdate can be generated in 1N HCl with from 96 to 100% efficiency. The current efficiency for molybdate generation in less acidic media could not be determined accurately. Coulometric titrations of known amounts of thorium with electrogenerated molybdate have been carried out. The endpoints, which were determined amperometrically, were found to be inexact and reproducible to only ± 5%. Coulometric titrations of lead …

Synthesis Of Silicon Compounds For Use In (P -> D) Pi-Bond Studies, Mark Thomas Messe

Honors Theses

A new compound, (CH3CH2)2 NCH2Si (CH3)3 (I), was prepared. Attempts at synthesis of Ø-N (CH3) – CH2Si (CH3)3 (II) failed while synthesis of CH30 – CH2Si (CH3)3 (III) gave approximately 85 percent product. Difficulty was incurred in the purification of III, probably because the reactants were not sufficiently dry. Compound I was only slightly miscible in CD2=S-CD3 in dimethylsulfoxide-D6. The soluble portion showed no exchange of the methylene hydrogens in I by deuterium from the solvent although some decomposition might have occured. The apparent complete absence of an exchange reaction suggests that even in the presence of the electronegative nitrogen, …

Towards Synthesis Of Bis -(N,N'-1,8-Naphthylene)- 1,8 - Diaminonaphthalene, William Chiu-Sheung Ng

Honors Theses

This project is concerned with attempted synthesis of a special highly symetrical compound. In the process of synthesis, It is conceivable than an intermediate product will be formed.

A Fluorometric Study Of Carbamic Acids And Carbamates As An Explanation Of Carbon Dioxide Transport In The Blood, Gerald John Tiberio

Honors Theses

The original project was conceived during the summer of 1967 while Bruce Cassidy was a research fellow of the Maine Heart Association. It is through his efforts I became aware of the problem.

This research project was undertaken in order to determine the applicability of fluorometry as a means of studying the carbamate reaction of simple amino acids to model the physiological substrate hemoglobin.

Nmr Investigation Of Alkylated Diethylene - Triamine Chloro Complexes Of Trivalent Gold, Alan Robert Case

Honors Theses

The rate expression for the su~stitution of a ligand in a square planar complex was first introduced in 1953 by Taube and Rich (1). The present study was undertaken in the hope of gathering some evidence for this postulated steric hinderance by use of Nuclear Magnetic Resonance Spectra (NMR). Study was limited to one family of complexes, the alkylated diethylenetriamine chloro complexes of gold (III).

Radiolysis Of Saturated Aqueous Iodine Solutions, Gregg Alan Foster

Honors Theses

It is a well-known fact that water, when subjected to ionizing radiation such as x-ray or gamma radiation, undergoes a decomposition. The generally accepted decomposition, although complex, may be represented by (1): It is also accepted that "when dilate solutions are irradiated, practically all the energy absorbed is deposited in water molecules and the observed chemical changes are brought about indirectly via the molecular and, particularly, the radical products. Direct action due to energy deposited in the solute is generally unimportant in dilute solutions (i.e at solute concentration below about 0.1M)” (3). Realizing that iodine is an excellent radical scavenger …

Energy Calculations For The 1Εg+, 1Δg, And 3Εg- Electronic States Of The Oxygen Molecule Using A Tangent Spheres Approach, Donald Francis Durocher

Honors Theses

J. W. Linnett has proposed in his book, The Electronic Structure of Molecules (l), an approach to molecular orbital theory which he calls the double-quartet approach. The double-quartet, or d-q approach in a molecule with a completed octet, states that electrons of each spin set assume, or try to assume a tetrahedral array around their 'mother atom'. In the case of molecular oxygen, there are three d-q figures representing the molecule in its ground and 1∑+g , 2∆g, states. This representation is shown in Figure 1. Henry A. Bent, at the University of Minnesota, has proposed that the electrons in …

The Radiolysis Of Aqueous Chloroform Solutions, Francis John Simone

Honors Theses

Saturated aqueous chloroform solutions have been irradiated with a 250 Curie gamma source. G-values for the production of hydrogen gas in neutral and acidic solutions have been determined.

Qualitative Thermodynamic Study Of Linkage Isomerism In Palladium (Ii) Complexes, Walter Michael Gantenbein

Honors Theses

The purpose of this research was to investigate linkage isomerism in dithiocyanatobistriphenylarsinepalladium (II), dithiocyanato-2,2'­bipyridinepalladium (II), and thiocyanatotetraethyldiethylenetriammine­palladium (II) thiocyanate. Studies of linkage isomerism in these compounds were made in the pure solid state using a Differential Scanning Calorimeter. The instrumental data was supplemented with visual observations of the isomerization.

(Ultra-Rapid) Fluorescent Labelling Of Proteins, Cynthia Elaine Wilson

Honors Theses

The goal at the outset of this research project was to prepare fluorescent labeled bovine plasma albumin. A reprint of "Ultra-Rapid Fluorescent Labelling of Proteins" by Dr. Henry Rinderknecht, Director of California Corporation for Biochemical Research, Los Angeles, California, was secured to serve as reference material for the project.

Solubility Of Manganese And Iron In Impoundment Waters, Jim Gilbert

Honors Theses

The purpose of this paper is to show the rate of solubility of certain elements (manganese and iron) in impoundment waters. The rate at which manganese and iron becomes soluble is important in determining if there is a change in the solubility of these elements in impoundment water and free running water.

The solubility of an element under impoundment waters represents a cycle. The mud on the bottom of impoundment waters contain the elements that are insoluble. At a certain stage the element becomes soluble, and it is released from the mud. The soluble element is much lighter than the …

An Attempt To Determine Molybdenum By Atomic Absorption Spectrophotometry, Gary Rice

Honors Theses

An attempt was made to work out a method for routinely determining molybdenum by atomic absorption spectrophotometry. A stock standard was prepared containing 100 ppm molybdenum as MO4. Sensitivity of the spectrophotometer was found to be zero for aqueous solutions in the 1-10 ppm range. A pH-dependence study of extraction of the molybdate with DDC and MIBK gave best results at about pH 4.

Kinetics Of The Decomposition Of The Cupric Ion Sulfhydryl Bond In Beef Plasma Albumin, Gary Rice

Honors Theses

The purpose of this work was to study the kinetics of the binding of cupric ion to beef plasma albumin, in particular the decomposition of the Cu++--BPA complex which absorbs light at 375 millimicrons.

The work of Klotz, Urquhart, Klotz, and Ayers has shown that the characteristic absorption band at 375 mu produced by the binding of cupric ion to beef plasma albumin is due to a copper- sulfhydryl bond. They have further demonstrated that the disappearance of this absorption band with time is accompanied by irreversible changes in the structure of the protein. The intensity of the initial absorption …

Ionium Age Determination, Leon Johnson

Honors Theses

Natural radioactive decay provides a means of determining the age of geological specimens. It is found that the number of atoms of a radioactive isotope disintegrating per unit time is linearly proportional to the existing number of atoms and independent of exterior parameters.