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The Determination of the Constants in the System of Methyl Alcohol, Formic Acid, Methyl Formate and Water
Problems presented in this paper concern the chemical equilibrium of methyl alcohol, formic acid, and methyl formate when combined.
Date:
August 1939
Creator:
Cox, Ross L.
System:
The UNT Digital Library
The Electrodeposition of Zinc
This thesis examines the use of zinc for electroplating and compares its use to other metals. Experiments conducted to gather data indicated circumstances which resulted in optimal results.
Date:
August 1939
Creator:
Flanagin, Charles E.
System:
The UNT Digital Library
A Quantitative Chemical Analysis of the Hicoria Pecan Nut Kernel
This thesis explores the Hicoria genus and focuses on the Stuart variety of pecan tree. Experimentation yielded the ash constituents, fats, fat constants, crude fiber, protein, and sugar in shelled pecan samples.
Date:
August 1939
Creator:
Hollingsworth, Asa Kenneth
System:
The UNT Digital Library
Diffusion of Hydrocarbons Through Rubber Membranes
This thesis explores the seperation of isomeric paraffins in organic chemistry and how the resulting mixture of hydrocarbons might be examined.
Date:
August 1939
Creator:
Long, Loren M.
System:
The UNT Digital Library
An Attempt to Produce a High Octane Gasoline from C4 Hydrocarbons
This thesis presents the results of an experiment conducted to discover if selenic acid or monazite sand are possible catalysts that can be used for the alkylation of isobutane and isobutene.
Date:
June 1939
Creator:
Scott, Howard Winfred
System:
The UNT Digital Library
Chlorosulfonic Acid Reactions with Saturated Hydrocarbons
This thesis examines the reactions of hydrocarbons exposed to chlorosulfonic acid in order to establish the reaction rate and associated molecular structure of each compound.
Date:
May 1939
Creator:
Stubblefield, H. L.
System:
The UNT Digital Library
Electrodeposition of Cadmium
This thesis presents findings of experiments conducted to determine the most feasible method to electroplate metal.
Date:
August 1939
Creator:
Bond, T. Jackson
System:
The UNT Digital Library
A Comparative Quantitative Study of the Common Elements Found in the Hackenberry
This comparative study attempts to determine the importance of soil fertility in determining how much of an element a plant absorbs.
Date:
June 1939
Creator:
Bailey, Duward W.
System:
The UNT Digital Library
A Chemical Analysis of Yellow Dent Corn
This study examines history, climate, and distribution in relation to the chemical content of yellow dent corn.
Date:
August 1939
Creator:
Hamby, R. B.
System:
The UNT Digital Library
A Dark Adaptation Study of College Men and Women
This study is the result of tests conducted to determine the adaptability of the human eye to darkness.
Date:
August 1940
Creator:
Henry, Archie
System:
The UNT Digital Library
A Mineral Analysis of the Water of Lake Wichita
This thesis resulted from analysis of the water in Lake Wichita so that sources of water content could be determined.
Date:
August 1940
Creator:
Lisle, F. M.
System:
The UNT Digital Library
A Chemical Investigation of Lake Dallas to Determine the Factors Influencing Plankton Growth.
A study to determine the organic content of Lake Dallas, and study the influence on plankton growth.
Date:
August 1939
Creator:
Welch, Herschel
System:
The UNT Digital Library
Synthetic and Structural Chemistry of Ligand-substituted Triosmium Clusters and a Rhenium(i) Complex
The reaction of 2-[(diphenylphosphino)methyl]-6-methylpyridine (PN) with Os3(CO)12-n(MeCN)n [where n = 0 (1), 1 (2), 2 (3)] has been investigated. Os3(CO)12 reacts with PN in the presence of Me3NO to afford the clusters Os3(CO)11(1-PN) (4) and 1,2-Os3(CO)10(1-PN)2 (5). X-ray diffraction analyses confirm the equatorial coordination of the phosphine(s) in 4 and 5, with the two phosphines in the latter cluster exhibiting a 1,2-trans orientation about the Os-Os vector that contains the two ligands. Treatment of the MeCN-substituted cluster Os3(CO)11(MeCN) and PN (1:1 ratio) in CH2Cl2 gives clusters 4 and 5, in addition to HOs3(η1-Cl)(CO)10(1-PN) (6) as a result of competitive activation of the reaction solvent. Cluster 6 contains 48e- and the diffraction structure reveals the presence of axial chloride and equatorial phosphine ligands which are located on adjacent osmium atoms. The bridging hydride ligand in 6 spans the Cl,P-substituted Os-Os vector. The reaction of Os3(CO)10(MeCN)2 with PN furnishes 5, 6, and 1,1-Os3(CO)10(2-PN) (7) in yields that are dependent on the reagent stoichiometry and reaction solvent. The solid-state structure of 7 confirms the chelation of the PN ligand to a single osmium atom via the pyridine and phosphine moieties at axial and equatorial sites, respectively. The bonding in 7 relative to other …
Date:
August 2013
Creator:
Lin, Chen-Hao
System:
The UNT Digital Library
Vibrational Spectra and Potential Function of Tetrachlorocyclopropene
The laser Raman spectra of tetrachlorocyclopropene in the liquid and solid phases have been recorded and vibrational assignments are presented. These results along with root mean squared vibrational amplitudes from electron diffraction data have been employed in a normal coordinate analysis in which a 19 parameter potential function is refined. This potential function, originally expressed in terms of compliance constants, is then used to derive the corresponding conventional and relaxed force constants.
Date:
August 1981
Creator:
Adame, I. Ernesto (Ignacio Ernesto)
System:
The UNT Digital Library
A New Chromophoric Organic Molecule Toward Improved Molecular Optoelectronic Devices
The characterization of 2,3,6,7,10,11-hexabromotriphenylene, Br6TP, is presented toward its potential use as an n-type organic semiconductor and metal-free room temperature phosphor. The crystal structure shows both anisotropic two-dimensional BrBr interactions and inter-layer ?-stacking interactions. Photophysical characteristics were evaluated using solid-state photoluminescence and diffuse reflectance spectroscopies, revealing significantly red-shifted excitations in the visible region for the yellow solid material (compared to ultraviolet absorption bands for the colorless dilute solutions). Correlation of spectral, electrochemical, and computational data suggest the presence of an n-type semiconducting behavior due to the electron-poor aromatic ring. The material shows excellent thermal stability as demonstrated by thermogravimetric analysis and infrared spectra of a thin film deposited by thermal evaporation. The potential for Br6TP and its analogues toward use in several types of photonic and electronic devices is discussed.
Date:
December 2012
Creator:
Halbert, Jason Paul
System:
The UNT Digital Library