Index Catalog // ScholarsArchive@OSU

Approaches to the total synthesis of verrucarol

Creator:: Hill, David E. (David Edwin) 1954-
Abstract:: Verrucarol is the sesquiterpene portion of a number of macrocyclic di- and triesters of potential medicinal importance. In this study, a novel approach to the synthesis of this fungal metabolite is presented. An A-B-C route was investigated in which C-3 and C-4 of the C-ring were emplaced using a [2+2]...
Resource Type:: Dissertation
Full Text:: ABSTRACT OF THE THESIS OF David E. Hill for the degree of Doctor of_Philosophy in Chemistry presented on

The adsorption of uranium ions from seawater

Creator:: Fyke, David Ray
Abstract:: The adsorption of uranium ions from seawater could be of importance as reserves of uranium are depleted. The structure, chemical state, and concentration of uranium in seawater have been previously determined. Uranium exists as a charged ion, UO₂(CO₃)₃⁴⁻. The concentration in seawater is 3.3 parts per billion. Previous studies with...
Resource Type:: Masters Thesis
Full Text:: OF THE THESIS OF David Ray Fyke for the degree of Master of Science in Chemistry presented on

A chemical and petrological study of igneous lithic clasts from the kapoeta howardite

Creator:: Smith, Monty Ray
Abstract:: Instrumental and radiochemical neutron activation analyses supported by electron microprobe mineral analyses (Paul Warren, University of New Mexico) and petrographic observations are presented for approximately forty individual clasts separated from the Kapoeta howardite. These clasts are classified into eucritic, cumulate-like, mafic (plagioclase ± olivine-bearing pyroxenites), pyroxenite, polymict and/or metal-rich and...
Resource Type:: Dissertation
Full Text:: from the Kapoeta Howardite AN ABSTRACT OF THE THESIS OF MONTY RAY SMITH for the degree of DOCTOR OF

Studies in molybdenum oxide catalysts : I. Metal vapor reactions of molybdenum trioxide with various alkoxy silanes : II. Investigation of oxide supported molybdenum catalysts prepared from molybdenum(VI)dioxodiethoxide

Creator:: Huffman, David Earl
Abstract:: The cocondensation reactions of molybdenum trioxide vapor with tetraalkoxysilanes, trimethylalkoxysilanes, and hexamethyldisiloxane at -196°C were investigated. The products from the metal vapor reactions of tetramethoxysilane, tetraethoxysilane, and tetrapropoxysilane were characterized as molybdenum(VI)dioxodialkoxy compounds. The isolated compounds were found to be polymeric in the solid state by bridging through alkoxide groups....
Resource Type:: Dissertation
Full Text:: molybdenum catalysts prepared from molybdenum(VI)dioxodiethoxide AN ABSTRACT OF THE THESIS OF David Earl

A reinvestigation of the molecular structure of cyclohexane-1,4-dione by electron diffraction

Creator:: Johnson, Robert David
Abstract:: We have investigated the gaseous structure of cyclohexane- 1,4-dione via electron diffraction. The large amplitude motion, as suggested from spectroscopic, dipole moment and earlier electron diffraction data was studied. The structure was refined in two types of models: a single "distorted boat" conformer, and a model comprised of a superposition...
Resource Type:: Masters Thesis
Full Text:: -1,4-dione by electron diffraction AN ABSTRACT OF THE THESIS OF ROBERT DAVID JOHNSON for the degree

Structural effects of intrinsic and extrinsic perturbations to model membranes

Creator:: Church, Sara E.
Abstract:: The observed and calculated structural parameters of three systems of phosphatidylcholine bilayers in fully-hydrated multilamellar vesicles (MLVs) were determined using x-ray diffraction techniques. The analysis used the x-ray reflections from the low-, intermediateand wide-angle regions of the diffraction patterns in the subgel, gel, rippled and fluid phases to determine the...
Resource Type:: Dissertation
Full Text:: vesicles (MLVs) were determined using x-ray diffraction techniques. The analysis used the x-ray

Synthesis of metabolites from the ascomycetes : I. The synthesis and absolute configuration of leptosphaerin : II. Approaches to the synthesis of byssochlamic acid

Creator:: Pallenberg, Alexander J.
Abstract:: Part I. The total synthesis of (+)-leptosphaerin (2), a metabolite of the marine Ascomycete Leptosphaeria Oraemaris (Linder) was achieved, unambiguously establishing both the relative and absolute stereochemistry of this natural product. This synthesis also resolved the long-standing question of which of the isomeric structures 1 or 2 correctly represents the...
Resource Type:: Dissertation
Full Text:: single crystal X-ray analysis. Part II. Two synthetic approaches to byssochlamic acid (3), a metabolite

Microcomputer controlled chemical and radiochemical separations and analysis

Creator:: Bennett, Casey Wayne
Abstract:: An automated radiochemical flow analysis (ARFA) system was developed which integrates chemical and radiochemical techniques into one system through the use of a microcomputer. The operator, through the microcomputer, controls valves and pumps to transfer sample and reagent solutions to counting loops, ion exchange columns and holdup reservoirs. A Ge(Li)...
Resource Type:: Dissertation
Full Text:: -multichannel analyzer to acquire a gamma ray spectrum. Computer control of solution handling allows count

Approaches to the synthesis of the macrolactone pyrrolizidine alkaloids (-)-integerrimine and (+)-usaramine

Creator:: Jayasinghe, Lalith Ratnasiri
Abstract:: A formal total synthesis of the macrolactone pyrolizidine alkaloid (-)-integerrimine (2), from R-(+)-citronellal (93) is described. Aldehyde 93 was converted to exo methylene derivative 94 which was reduced to allylic alcohol 95. The epoxides 96 and 98, obtained in a ratio of 3:1 respectively by Sharp less epoxidation of 95...
Resource Type:: Dissertation
Full Text:: provided 3-lactone 102, the structure of which was confirmed by X-ray crystallographic analysis. Oxidation

Photoelectron spectroscopy of small molecules

Creator:: Bomben, Kenneth D.
Abstract:: The photoelectron spectra of a series of halogenated molecules have been investigated in the gas phase. Both core-ionization energies and Auger kinetic energies were measured to probe the nature of the interaction that holds a core electron to the molecule. It was found that satellite structure (shake) could be used...
Resource Type:: Dissertation
Full Text:: . OTHER MOLECULES 61 V. REFERENCES AND FOOTNOTES 63 VI. APPENDICES A. X-RAY GENERATION 1. Criteria

ScholarsArchive@OSU

Approaches to the total synthesis of verrucarol

The adsorption of uranium ions from seawater

A chemical and petrological study of igneous lithic clasts from the kapoeta howardite

Studies in molybdenum oxide catalysts : I. Metal vapor reactions of molybdenum trioxide with various alkoxy silanes : II. Investigation of oxide supported molybdenum catalysts prepared from molybdenum(VI)dioxodiethoxide

A reinvestigation of the molecular structure of cyclohexane-1,4-dione by electron diffraction

Structural effects of intrinsic and extrinsic perturbations to model membranes

Synthesis of metabolites from the ascomycetes : I. The synthesis and absolute configuration of leptosphaerin : II. Approaches to the synthesis of byssochlamic acid

Microcomputer controlled chemical and radiochemical separations and analysis

Approaches to the synthesis of the macrolactone pyrrolizidine alkaloids (-)-integerrimine and (+)-usaramine

Photoelectron spectroscopy of small molecules

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