[Chemistry]

[Chemistry]

Date: unknown
Creator: unknown
Description: Photograph of two student mixing chemicals in a chemistry class. The male student is pouring liquid from a graduated cylinder into a round bottom flask, while the female student is using a pipette to pour liquid into a bottle. They are surrounded by chemistry lab material and are wearing protective aprons.
Contributing Partner: UNT Archives
Metals in Chemistry and Biology: Computational Chemistry Studies

Metals in Chemistry and Biology: Computational Chemistry Studies

Date: May 2007
Creator: Dinescu, Adriana
Description: Numerous enzymatic reactions are controlled by the chemistry of metallic ions. This dissertation investigates the electronic properties of three transition metal (copper, chromium, and nickel) complexes and describes modeling studies performed on glutathione synthetase. (1) Copper nitrene complexes were computationally characterized, as these complexes have yet to be experimentally isolated. (2) Multireference calculations were carried out on a symmetric C2v chromium dimer derived from the crystal structure of the [(tBu3SiO)Cr(µ-OSitBu3)]2 complex. (3) The T-shaped geometry of a three-coordinate β-diketiminate nickel(I) complex with a CO ligand was compared and contrasted with isoelectronic and isosteric copper(II) complexes. (4) Glutathione synthetase (GS), an enzyme that belongs to the ATP-grasp superfamily, catalyzes the (Mg, ATP)-dependent biosynthesis of glutathione (GSH) from γ-glutamylcysteine and glycine. The free and reactant forms of human GS (wild-type and glycine mutants) were modeled computationally by employing molecular dynamics simulations, as these currently have not been structurally characterized.
Contributing Partner: UNT Libraries
[Chemistry Society, 1942]

[Chemistry Society, 1942]

Date: 1942
Creator: unknown
Description: Photograph of the chemistry society posing in front of the entrance of a building in the 1940's.
Contributing Partner: UNT Archives
[Chemistry Students in Lab]

[Chemistry Students in Lab]

Date: unknown
Creator: unknown
Description: Photograph of two male students studying chemicals in a laboratory. One student is sitting on a stool holding a test tube as the other student stands and watches.
Contributing Partner: UNT Archives
[Review] Chemistry of Advanced Materials: An Overview

[Review] Chemistry of Advanced Materials: An Overview

Date: December 29, 1998
Creator: Cundari, Thomas R., 1964-
Description: This book review discusses 'Chemistry of Advanced Materials: An Overview', edited by Leonard V. Interrante from Renssalaer Polytechnic Institute, and Mark J. Hampden-Smith from the University of New Mexico.
Contributing Partner: UNT College of Arts and Sciences
[Review] Computational Inorganic and Bioinorganic Chemistry

[Review] Computational Inorganic and Bioinorganic Chemistry

Date: April 28, 2010
Creator: Cundari, Thomas R., 1964-
Description: This book review discusses 'Computational Inorganic and Bioinorganic Chemistry', edited by Edward I. Solomon from Stanford University, Robert A. Scott from the University of Georgia Athens, and R. Bruce King from the University of Georgia Athens.
Contributing Partner: UNT College of Arts and Sciences
[Margaret Cox in a Chemistry Lab]

[Margaret Cox in a Chemistry Lab]

Date: unknown
Creator: unknown
Description: Photograph of Margaret Cox holding a test tube in a Chemistry Lab.
Contributing Partner: UNT Archives
Quantum Perspectives on Physical and Inorganic Chemistry

Quantum Perspectives on Physical and Inorganic Chemistry

Date: December 2007
Creator: Grimes-Marchan, Thomas V.
Description: Applications of computational quantum chemistry are presented, including an analysis of the photophysics of cyclic trinuclear coinage metal pyrazolates, an investigation into a potential catalytic cycle utilizing transition metal scorpionates to activate arene C-H bonds, and a presentation of the benchmarking of a new composite model chemistry (the correlation consistent composite approach, ccCA) for the prediction of classical barrier heights. Modeling the pyrazolate photophysics indicates a significant geometric distortion upon excitation and the impact of both metal identity and substituents on the pyrazolates, pointing to ways in which these systems may be used to produce rationally-tuned phosphors. Similarly, thermodynamic and structural investigations into the catalyst system points to promising candidates for clean catalytic activation of arenes. The ccCA was found to reproduce classical reaction barriers with chemical accuracy, outperforming all DFT, ab initio, and composite methods benchmarked.
Contributing Partner: UNT Libraries
Affordances of Instrumentation in General Chemistry Laboratories

Affordances of Instrumentation in General Chemistry Laboratories

Date: August 2010
Creator: Sherman, Kristin Mary Daniels
Description: The purpose of this study is to find out what students in the first chemistry course at the undergraduate level (general chemistry for science majors) know about the affordances of instrumentation used in the general chemistry laboratory and how their knowledge develops over time. Overall, students see the PASCO™ system as a useful and accurate measuring tool for general chemistry labs. They see the probeware as easy to use, portable, and able to interact with computers. Students find that the PASCO™ probeware system is useful in their general chemistry labs, more advanced chemistry labs, and in other science classes, and can be used in a variety of labs done in general chemistry. Students learn the affordances of the probeware through the lab manual, the laboratory teaching assistant, by trial and error, and from each other. The use of probeware systems provides lab instructors the opportunity to focus on the concepts illustrated by experiments and the opportunity to spend time discussing the results. In order to teach effectively, the instructor must know the correct name of the components involved, how to assemble and disassemble it correctly, how to troubleshoot the software, and must be able to replace broken or missing components ...
Contributing Partner: UNT Libraries
The Synthesis and Chemistry of Polyciclic Cage Compounds

The Synthesis and Chemistry of Polyciclic Cage Compounds

Date: December 1994
Creator: Wang, Yanjun
Description: Chapter I describes the synthesis of a trishomocubyl helical tubuland diol and some aspects of its inclusion chemistry. Thus, all three isomers of 4,7-dimethylpentacyclo[6.3.0.0^2,6.0^3,10.0^5,9]undecane-4,7-diol have been prepared and their X-ray structures have been determined. The syn,syn-isomer crystallizes in a double-stranded hydrogen-bonded lattice, while anti,syn-isomer forms a hydrogen-bonded layer lattice. In contrast, the anti,anti-isomer is a new member of the helical tubuland diol host family; its crystal lattice consists of parallel canals with a trefoil-shaped cross-section of area 25.4 Å^2. Chapter II describes the synthesis of new molecular clefts. These molecular clefts have been synthesized via base-promoted reactions of 3,6-diaryl-l,2,4,5-tetrazines with tetracyclo[6.3.0.0^4,11.0^5,9]undecane-3,6-dione and with tricyclo[6.3.0.0^2,6]undecane-3,11-dione, respectively. Compounds of this type are of interest as a potential new class of host molecules for use in host-guest complexation studies. Chapter III reports the synthesis of stereospecifically deuterated spiro(oxetane-3,8'-pentacyclo[5.4.0.0^2,6.0^3,10.0^5,9]undecanes) and their acid-promoted ring opening and concomitant rearrangements. The deuterium-containing reaction products have been characterized via analysis of their NMR and mass spectra. The results strongly suggest that intramolecular 1,5-hydride shifts provide an important pathway through which the acid promoted rearrangements occur. Chapter IV reports the oxidation of heptacyclo-[6.6.0.0^2,6.0^3,13.0^4,11.0^5,9.0^10,14] tetradecane (HCTD) via application of Barton's "GoAgg" systems. The products have been characterized by NMR and ...
Contributing Partner: UNT Libraries
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