You limited your search to:
Partner:
UNT Libraries
Department:
Department of Chemistry
Language:
English
Collection:
UNT Theses and Dissertations
Chirped-Pulse Fourier Transform Microwave Spectroscopy of Fluoroiodoacetonitrile and Chloropentafluoroacetone
Date: December 2010
Creator: Kadiwar, Gautam
Description: This work focuses on finding the complete iodine and nitrogen nuclear electric quadrupole coupling tensors for fluoroiodoacetonitrile using chirped-pulse Fourier transform microwave spectroscopy. Fluoroiodoacetonitrile contains two hyperfine nuclei, iodine (I=5/2) and nitrogen (I=1) and the spectra were observed with great resolution. A total of 499 transitions were observed for this molecule. The a, b and c rotational constants were obtained. A study of chloropentafluoroacetone was also done using chirped-pulse Fourier transform microwave spectroscopy. The two chlorine isotopes for this molecule, Cl-35 and Cl-37 were observed and 326 and 170 transitions were recorded, respectively.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc84230/
Chlorination of Neohexane
Date: 1947
Creator: Kemplin, J. C.
Description: This thesis describes an experiment to chorinate neohexane, and the resulting compounds.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc53517/
A Comparative Investigation of the Water of Lake Bridgeport with Reference to Plant and Animal Life
Date: August 1937
Creator: Woods, Alethea Marie
Description: The investigation of the waters of Lake Bridgeport is to obtain data essential for a satisfactory understanding of the physical and chemical factors on the aquatic life. These factors detremine the kinds of food available for life there.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc29876/
A Comparative Quantitative Study of the Common Elements Found in the Post Oak and Willow
Date: August 1939
Creator: Clark, James L.
Description: This thesis explores the chemical contents of post oak and willow trees. Samples of each tree are compared to determine the amount of sulfur, phosphorus, potassium, sodium, silicon, iron, aluminum, calcium, magnesium, and manganese in them. Results indicated usefulness of each tree to humans.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc33245/
A Comparative Study of Errors in Chemistry and English Found in Examination Papers of Freshman Chemistry
Date: August 1938
Creator: Phillips, Annie
Description: This study attempts to discover what types of errors are commonly made by students in freshman chemistry classes. It considers the errors resulting from the students' lack of knowledge of the subject taught, and errors attributed to their failure to use correct English in their expression of ideas.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc29927/
Comparison of Homework Systems (Four Web-Based) used in First-Semester General Chemistry
Date: May 2009
Creator: Belland, Joshua
Description: Web-based homework systems are becoming more common in general chemistry as instructors face ever-increasing enrollment. Yet providing meaningful feedback on assignments remains of the utmost importance. Chemistry instructors consider completion of homework integral to students' success in chemistry, yet only a few studies have compared the use of Web-based systems to the traditional paper-and-pencil homework within general chemistry. This study compares the traditional homework system to four different Web-based systems. Data from eight, semester classes consisting of a diagnostic pre-test, final semester grades, and the number of successful and unsuccessful students are analyzed. Statistically significant results suggest a chemistry instructor should carefully consider options when selecting a homework system.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc9858/
A Comparison of the Achievements of Science and Non-Science Majors Enrolled in General Chemistry at North Texas State College
Date: 1951
Creator: Brogdon, Billie R.
Description: It is the specific purpose of this investigation to determine the difference, if any, in the amount of practical, everyday chemistry learned by the science majors as opposed to the non-science majors enrolled in general chemistry at the North Texas State College during the school year 1950-1951.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc96990/
A Complete Chemical Analysis of Samples Taken from the Three Artesian Waters of Denton County
Date: August 1936
Creator: Allen, John William
Description: The purpose of this study was to determine the chemical content of Denton County's (Texas) water. Based on the analysis of the three samples, the water of Denton County is classed as poor for irrigation.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc29825/
Computational Investigation of Molecular Optoelectronic and Biological Systems
Date: August 2011
Creator: Tekarli, Sammer M.
Description: The scope of work in this dissertation has comprised several major investigations on applications and theoretical studies of ab initio quantum mechanics and density functional theory where those techniques were applied to the following: (i) investigation of the performance of density functionals for the computations of molecular properties of 3d transition metal containing systems; (ii) guidance for experimental groups for rational design of macrometallocyclic multinuclear complexes with superior π-acidity and π-basicity that are most suitable for p- and n-type semiconductors of metal-organic molecules and nanomaterials; (iii) investigation of the metallo-aromaticity of multi-nuclear metal complexes; (iv) investigation of the kinetics and thermodynamics of copper-mediated nitrene insertion into C-H and H-H bond; and (v) accurate computations of dissociation energies of hydrogen-bonded DNA duplex moieties utilizing the resolution of identity correlation consistent composite approach (RI-ccCA).
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc84288/
A Computational Investigation of the Photophysical, Electronic and Bonding Properties of Exciplex-Forming Van der Waals Systems
Date: December 2007
Creator: Sinha, Pankaj
Description: Calculations were performed on transition-metal complexes to (1) extrapolate the structure and bonding of the ground and phosphorescent states (2) determine the luminescence energies and (3) assist in difficult assignment of luminescent transitions. In the [Pt(SCN)4]2- complex, calculations determined that the major excited-state distortion is derived from a b2g bending mode rather than from the a1g symmetric stretching mode previously reported in the literature. Tuning of excimer formation was explained in the [Au(SCN)2]22- by interactions with the counterion. Weak bonding interactions and luminescent transitions were explained by calculation of Hg dimers, excimers and exciplexes formed with noble gases.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc5121/