Oxovanadium(IV) Complexes of Substituted N-(2-Thiophenyl)Salicylideneimine (open access)

Oxovanadium(IV) Complexes of Substituted N-(2-Thiophenyl)Salicylideneimine

In an effort to study the spectral, magnetic, and stereochemical properties of vanadyl complexes, both a new series of vanadyl complexes derived from type (VII) ligands with subnormal magnetic moment and from type (VIII) ligands with normal magnetic moment are synthesized and characterized.
Date: June 1970
Creator: Lee, Cheng Chang
System: The UNT Digital Library
ESR Studies of Group IV Substituted Anilines (open access)

ESR Studies of Group IV Substituted Anilines

The purpose of the investigation described herein was to investigate the degree of delocalization of the unpaired electron in ion radicals formed in the oxidation process of compounds with aromatic rings connected by means of various groups and atoms not entering the ring; then, to establish the relationship of coupling constants in radical cations with substituent σ values. The parent cation radical, in which the co-planar ion was derived from N,N-dimethylaniline, was selected in order to maximize the substituent effects on coupling constants and to obtain couplings at several positions (specifically, CH3, N, and ring protons).
Date: June 1970
Creator: Wong, Pui-Suen
System: The UNT Digital Library
Synthesis, Stability, and Reactions of Dichloroketene (open access)

Synthesis, Stability, and Reactions of Dichloroketene

The primary objective of this work was to prepare dichloroketene.
Date: June 1965
Creator: Liddel, Harold Glenn
System: The UNT Digital Library
Synthesis of Selected 2-imidazolines (open access)

Synthesis of Selected 2-imidazolines

Since Djerassi and Scholz found that 2-(aryloxy-methyl)imidazolines and their hydrochloride salts exhibit vasoconstrictive properties, the 1,2-(I) 1,3-(II) and 1,4-bis-(2-imidazolinylmethoxy) benzene (III) analogs (Fig. 1, p.2) were chosen for synthesis in order to test them for their effective vasoconstrictive characteristics and for whatever other physiological properties they might exhibit.
Date: June 1966
Creator: Maurer, Larry Eugene
System: The UNT Digital Library
Barbituric Acids. VI. 5-substituted-mercapto Derivatives of 5-ethylbarbituric Acid (open access)

Barbituric Acids. VI. 5-substituted-mercapto Derivatives of 5-ethylbarbituric Acid

The reaction of 5-bromo-5-ethylbarbituric acid with mercaptan and pyridine in cold ether solution was studied and was found to be satisfactory for the preparation of the compounds reported in this work.
Date: June 1954
Creator: Jeanes, Cecil Byron
System: The UNT Digital Library
Self-diffusion of Pb210 and Cl36 in Molten PbCl2-KCl Mixtures in the Region of the Compound 2PbCl2-KCl (open access)

Self-diffusion of Pb210 and Cl36 in Molten PbCl2-KCl Mixtures in the Region of the Compound 2PbCl2-KCl

The specific goal of the investigation was the measurement, as a function of temperature, of the self-diffusion coefficients of Pb210 and Cl36 in PbCl2-KCl compositions in the region of the first compound, and to calculate from these data the activation energy necessary for the diffusion of these ions.
Date: June 1960
Creator: Tidwell, Troy Haskell
System: The UNT Digital Library
Base Effects on the Thermal Decomposition of Sec-butyllithium Solutions (open access)

Base Effects on the Thermal Decomposition of Sec-butyllithium Solutions

The pyrolysis of sec-butyllithium in solution was studied in an attempt to understand the loss of stereo-specificity and the atypical kinetics that have been reported. Additionally, the effect of added lithium alkoxides was studied to determine their effects on the highly reactive sec-butyllithium substrate.
Date: June 1966
Creator: Adams, George Michael
System: The UNT Digital Library
Cycloadditions of Dichloroketene (open access)

Cycloadditions of Dichloroketene

An investigation of the cycloaddition behavior of dichloroketene with various types of olefins seemed in order to determine if dichloroketene behaved similarly to dialkylketenes. It was anticipated that a study of this type would indicate the reactivity of dichloroketene to various types of olefinic compounds and thus establish if the ease of cycloaddition with dichloroketene parallels the nucleophilicity of the olefin as it does in dialkylketenes.
Date: June 1967
Creator: Waters, Oralee Hurst
System: The UNT Digital Library
The Photochemical Reactions of 2,7-dimethyloctane (open access)

The Photochemical Reactions of 2,7-dimethyloctane

This thesis is a study of the photochemical reactions of 2,7-dimethyloctane.
Date: June 1953
Creator: Trammell, Margaret Ruth
System: The UNT Digital Library
Nitrogen Derivatives of Naphthoquinone (open access)

Nitrogen Derivatives of Naphthoquinone

A series of nitrogen derivatives of 1,4-naphthoquinone, which are structurally similar to the compounds of Hall, has been prepared by this worker. In general, the amido groups are those of the long-chain, fatty acids, and it is believed they will have increased physiological activity. These compounds are to be tested for medicinal activity by Parke-Davis and Company.
Date: June 1953
Creator: Wood, Frank M.
System: The UNT Digital Library
Reductions of 3,6-diphenyl-s-tetrazines (open access)

Reductions of 3,6-diphenyl-s-tetrazines

In the course of attempting to prepare 3,6-bis(hydroxy-methyl)-s-tetrazine via the reduction of 3,6-bis(carboxy)-s-tetrazine with lithium aluminum hydride, it became apparent that the tetrazine ring was cleaved.
Date: June 1963
Creator: Creagh, Linda T.
System: The UNT Digital Library
Preparation of Styrl Derivatives of 2,3-dimethyl-4,9-dioxo-1(2-propyl)-naphth[2,3-d] (open access)

Preparation of Styrl Derivatives of 2,3-dimethyl-4,9-dioxo-1(2-propyl)-naphth[2,3-d]

A series of compounds were prepared by condensing 2,3-dimethyl-4,9-dioxo-1-(2-propyl)-naphth[2,3-d] imidazolium iodide with various aromatic aldehydes.
Date: June 1963
Creator: Hayes, David Wayne
System: The UNT Digital Library
Synthesis and Infrared Spectra of Substituted Phthalimidines (open access)

Synthesis and Infrared Spectra of Substituted Phthalimidines

A number of N-substituted-3-hydroxy-3-phenylphthal-imidines and some of the isomeric amides have been prepared in order to study changes in the infrared spectra of these compounds due to structural changes in the molecule, particularly with reference to a hydroxyl band at 3.0µ and a carbonyl band at 5.75µ.
Date: June 1962
Creator: Reeves, Linda R.
System: The UNT Digital Library
Preparation of Alkoxy Derivatives of 2-Chloro-1,4-Naphthoquinone and 2-Chloro-5(8?)- Nitro-1,4-Naphthoquinone (open access)

Preparation of Alkoxy Derivatives of 2-Chloro-1,4-Naphthoquinone and 2-Chloro-5(8?)- Nitro-1,4-Naphthoquinone

This paper studies the the synthesis of certain alkoxy compounds of 2,3-dichloro-1,4-naphthoquinone that can be considered chemotherapeutic agents.
Date: June 1962
Creator: Hern, Kenneth T.
System: The UNT Digital Library
Synthesis of Polyaldehydes (open access)

Synthesis of Polyaldehydes

Part one of this thesis concerns the polymerizability of some α,β-unsaturated monaldehydes and also relates the synthesis of some new polyaldehydes which have not been reported in the literature. Part two concerns the polymerization of glyoxal, the simplest dialdehyde, and the structure elucidation of this new polymer.
Date: June 1964
Creator: O'Neal, Hubert Ronald
System: The UNT Digital Library
High Temperature Enthalpies of the Lead Halides: Enthalpies and Entropies of Fusion (open access)

High Temperature Enthalpies of the Lead Halides: Enthalpies and Entropies of Fusion

The objectives of this investigation were: 1. To establish calorimetrically the transition temperature for the orthorhombic to cubic transition exhibited by PbF₂ and to determine the enthalpy of this transition. 2. To determine if the solid-solid phase transitions claimed in the literature for PbCl₂, PbF₂, PbBr₂, and PbI₂ were of thermodynamic importance, and if so, to determine the enthalpies of transition. 3. To determine if the discontinuous thermal expansions reported by Hsu for the lead halides were of thermodynamic importance. 4. To obtain reliable heat content data for the lead halides in both the solid and liquid states.
Date: June 1970
Creator: Linsey, Clarence W.
System: The UNT Digital Library
The Stereochemistry and Mechanism of Alkylhaloketene-Olefin Cycloadditions (open access)

The Stereochemistry and Mechanism of Alkylhaloketene-Olefin Cycloadditions

The objectives of this research problem was to employ alkylhaloketene-olefin isomer distributions to aid in understanding the stereochemistry and mechanism of alkylhaloketene-olefin cycloadditions.
Date: June 1970
Creator: Roe, Robert, 1934-
System: The UNT Digital Library
The Crystal and Molecular Structures of 8-Hydroxyquinoline-N-Oxide and 2-Hydroxymethylpyridine-N-Oxide (open access)

The Crystal and Molecular Structures of 8-Hydroxyquinoline-N-Oxide and 2-Hydroxymethylpyridine-N-Oxide

This dissertation looked at the crystal structure analysis of 2-hydroxymethylpyridine-N-oxide sine this compound could provide data on both substituent effects and hydrogen bonding.
Date: June 1970
Creator: Terry, John Christopher
System: The UNT Digital Library
Quantitative Chemical Analysis of the Soils of Erath County, Texas (open access)

Quantitative Chemical Analysis of the Soils of Erath County, Texas

A chemical analysis of representative samples of Windthorst sand, Denton sand, and Denton clay has been made, and this analysis shows that their composition has a strict correlation with respect to their geological origins. The analyses of the different soils have shown the Windthorst sand to be highly deficient in all of the essential elements, whereas the Denton sand is deficient in only one; namely, phosphorus. The analysis of the Denton clay showed it to be highly fertile. From the consideration of the pH and the lime content, it has been determined to some extent what crops will grow in each of the soils.
Date: June 1938
Creator: Barnes, Benjamin F.
System: The UNT Digital Library
A Study of the Quantitative Determination of Nitrogen (open access)

A Study of the Quantitative Determination of Nitrogen

The purpose of this paper is to investigate the Kjeldahl method of nitrogen determination.
Date: June 1938
Creator: Willard, John Gordon
System: The UNT Digital Library
Application of Concentration, Adsorption and pH in the Precipitation of the Metal Ions of Groups II and III (open access)

Application of Concentration, Adsorption and pH in the Precipitation of the Metal Ions of Groups II and III

In this thesis, the process involved in the precipitations and separations of the metal of Group II and Group III studied. Suggestions have also been offered whereby students can make an analysis without loosing metals in the initial precepitation.
Date: June 1937
Creator: Cockerell, Leone Doris
System: The UNT Digital Library
Mercury-Sensitized Photochemical Action on a Mixture of Isobutane and Isobutene (open access)

Mercury-Sensitized Photochemical Action on a Mixture of Isobutane and Isobutene

This study investigated mercury-sensitized photochemical action on a mixture of isobutane and isobutene. Flow runs of isobutane-isobutene 3.2.1 mercury-saturated gases illuminated with unfiltered radiation of mercury vapor lamp gave no detectable change to hydrocarbons heavier than C4 at reaction tempratures of 27C. and 99C.
Date: June 1939
Creator: Gary, Felice
System: The UNT Digital Library
An Experimental Study of the Electrodeposition of Lead (open access)

An Experimental Study of the Electrodeposition of Lead

This thesis aimed to study some of the general principles underlying electrodeposition together with experimental facts regarding the effects of changing constituents of the plating solutions, variations in hydrogen-ion concentrations, and variation in current density used in the electrodeposition of lead.
Date: June 1937
Creator: Roberts, Ira Clifford
System: The UNT Digital Library
Synthesis of N-phenacyl Pyridines and N-phenacyl Piperidines (open access)

Synthesis of N-phenacyl Pyridines and N-phenacyl Piperidines

It has been observed by Kröhnke, that certain N-substituted pyridinum compunds possess both pressor and ergot-like activity. It has also been reported that both N-phenacylpiperidinium hydrochloride and the corresponding carbinol have some value as local anaesthetics.
Date: June 1947
Creator: Goode, William E.
System: The UNT Digital Library