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Department of Chemistry
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Chemistry
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UNT Theses and Dissertations
1-(4, 4'-Dinitrodiphenylmethyl)-Piperidines; 1-(4-Nitrobenzyl)-and 1-(4-Nitrobenzoyl)-Piperdines
Date: 1953
Creator: Sammons, George D.
Description: This study experiments with the methods of 1-(4, 4'-Dinitrodiphenylmethyl)-Piperidines; 1-(4-Nitrobenzyl)-and 1-(4-Nitrobenzoyl)-Piperdines.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc107844/
2-Dialkylaminoethyl Ketals of Benzophenone; the Attempted Synthesis of some Heterocyclic Sulfones
Date: 1949
Creator: Compton, William David
Description: This thesis describes two experiments: one related to antihistamines, and the other related to antitubercular compounds.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc83523/
α-(4-Aminophenylsulfonyl)-Acetophenone Derivatives; N-Diphenylmethyl and N-Fluorenyl Piperidines
Date: 1949
Creator: Middleton, William J.
Description: This thesis is a study of α-(4-aminophenylsulfonyl)-acetophenone derivatives; n-diphenylmethyl and n-fluorenyl piperidines.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc83593/
Adhesion/diffusion barrier layers for copper integration: carbon-silicon polymer films and tantalum substrates
Date: December 1999
Creator: Chen, Li
Description: The Semiconductor Industry Association (SIA) has identified the integration of copper (Cu) with low-dielectric-constant (low-k) materials as a critical goal for future interconnect architectures. A fundamental understanding of the chemical interaction of Cu with various substrates, including diffusion barriers and adhesion promoters, is essential to achieve this goal. The objective of this research is to develop novel organic polymers as Cu/low-k interfacial layers and to investigate popular barrier candidates, such as clean and modified tantalum (Ta) substrates. Carbon-silicon (C-Si) polymeric films have been formed by electron beam bombardment or ultraviolet (UV) radiation of molecularly adsorbed vinyl silane precursors on metal substrates under ultra-high vacuum (UHV) conditions. Temperature programmed desorption (TPD) studies show that polymerization is via the vinyl groups, while Auger electron spectroscopy (AES) results show that the polymerized films have compositions similar to the precursors. Films derived from vinyltrimethyl silane (VTMS) are adherent and stable on Ta substrates until 1100 K. Diffusion of deposited Cu overlayers is not observed below 800 K, with dewetting occurred only above 400 K. Hexafluorobenzene moieties can also be incorporated into the growing film with good thermal stability. Studies on the Ta substrates demonstrate that even sub-monolayer coverages of oxygen or carbide on polycrystalline ...
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc2255/
The Adsorption of Radioactive Isotopes on Precipitates
Date: January 1954
Creator: Bulloch, Newman Payne
Description: This thesis concerns the investigation of radioisotopes as indicators for precipitation reactions. As a precipitate forms in the presence of a radioisotope, adsorption may take place on its surface. If this adsorption changes markedly at the stoichiometric point it will be possible to use this variation as an indicator for the reaction.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc130352/
The Adsorption of Radioactive Isotopes on Specific Precipitates
Date: August 1954
Creator: Yarbrough, Kenneth N.
Description: The purpose of this investigation is to reveal the effects of certain factors affecting adsorption on some specific precipitates. It is hoped that the choice of precipitate types will enable extension of the information gained here to other precipitates similar to those investigated.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc130408/
Amine Derivatives of 3-chloro-5(8?)-nitro-1,4-naphthoquinone
Date: August 1952
Creator: Whitaker, Leroy, 1929-
Description: This work deals with the preparation of amine derivatives of 3-chloro-5(8?)-nitro-1,4-naphthoquinone which are to be tested for anti-tubercular activity by Parke, Davis and Company.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc130300/
a-Amino Alcohol Derivatives of Methyl P-Nitrophenyl Acetate
Date: 1947
Creator: Prindle, Hershel B.
Description: This thesis describes the synthesis of a series of dialkylaminoalkoxy derivatives of methyl p-nitrophenylacetate for testing as anti-histamine or hay fever drugs.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc75629/
An analysis of the effectiveness of computer assisted instruction in general chemistry at an urban university.
Date: May 2002
Creator: McGuffey, Angela
Description: The science-major General Chemistry sequence offered at the University of Houston has been investigated with respect to the effectiveness of recent incorporation of various levels of computer technology. As part of this investigation, questionnaire responses, student evaluations and grade averages and distributions from up to the last ten years have been analyzed and compared. Increased use of web-based material is both popular and effective, particularly with respect to providing extra information and supplemental questions. Instructor contact via e-mail is also well-received. Both uses of technology should be encouraged. In contrast, electronic classroom presentation is less popular. While initial use may lead to improved grades and retention, these levels decrease quickly, possibly due to a reduction in instructor spontaneity.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc3129/
An Application of the Reformatsky Reaction to the Thiophene Series of Compounds
Date: 1949
Creator: Hicks, Howard A.
Description: In view of the increasing importance of thiophene derivatives as chemotherapeutic agents, it was considered of interest to apply the Reformatsky reaction to the synthesis of compounds containing the thiophene nucleus with the thought that these might serve as intermediates for further syntheses.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc83566/