Index Catalog // ScholarsArchive@OSU

Studies toward the total synthesis of (+)-providencin

Creator:: Jana, Somnath
Abstract:: Studies toward the total synthesis of (+)-providencin (1), a highly oxygenated cembranoid dipterpene with a unique bicyclo[12.2.0]hexadecane skeleton and pronounced biological activity, are described. These studies resulted in the synthesis of advanced intermediates 320 and 332 which contain all of the carbon atoms of 1. In a first generation approach...
Resource Type:: Dissertation
Full Text:: subunit 228 needed for 1 was prepared successfully using carbometallation-iodination of alkyne 231

Gaseous electron-diffraction investigations : I. Development of high-temperature nozzles : II. Molecular structure and barrier to internal rotation of diboron tetrafluoride and diboron tetrabromide : III. Molecular structure and composition of 2,3-butanedione and oxalyl chloride at high temperature

Creator:: Danielson, Donald Delbert
Abstract:: The design and construction of two new sample injection systems or nozzles, for use with the Oregon State electron diffraction apparatus are discussed. One of these nozzles was intended for use with volatile samples the vapors of which were to be heated or cooled over the range -196 to 540°C;...
Resource Type:: Dissertation
Full Text:: 228°C revealed only a trans conformer, in contrast to certain similar conjugated systems which have

Water and methanol adsorption on a series of organic complexes of montmorillonite

Creator:: Carter, Loren Sheldon
Abstract:: Water and methanol adsorption isotherms at 25° and 37° C. were determined on a series of organo-bentonite clays. The clays differed in the length of the carbon chain attached to the amine adsorbed in the cation exchange position. The amines used had carbon chains of 4, 6, 8, 10, 12,...
Resource Type:: Masters Thesis
Full Text:: about one millimeter extension per milligram of load. The isotherms were typical type II isotherms and

Synthesis, characterization, and analysis of nitroaromatic compounds

Creator:: McIntosh, Melissa Luana
Abstract:: Nitroaromatic compounds have important chemical applications and can be found in nature as pollution sources. Synthetic nitroaromatic compounds have been used in a variety of materials including explosives, pharmaceuticals, dyes, plastics, and pesticides. These compounds can find their way into the environment through normal or improper disposal methods. Poly-aromatic compounds...
Resource Type:: Masters Thesis
Full Text:: extension of this methodology to the synthesis of heterocycles such as poly-aromatic triazoles and

The normal vibrational analysis of polyacetaldehyde

Creator:: Lee, Dorothy
Abstract:: A method of calculating the normal vibrations of polymer molecules is presented in detail. The method is based on that used by Schachtschneider and Snyder in their analysis of polypropylene but has not heretofore been published. The factoring of the infinite matrix and reduction to the coordinates of the unit...
Resource Type:: Dissertation
Full Text:: rnolecules to rnake the extension to polyrner rnolecules by this rnethod. The geometry of polyrner chains

Studying fusion reactions for effect of PCN on heavy nucleus formation and for nuclear structure effects

Creator:: Naik, Radhika
Abstract:: The fusion reaction ²⁰⁸Pb (⁵⁰Ti, xn) ²⁵⁸⁻x Rf (x = 1-3) was studied to determine PCN (probability that the mononucleus system evolves to form a compound nucleus inside the fission saddle point) and to establish the value of Wsur (survival probability) for the given reaction experimentally. The fission excitation function...
Resource Type:: Dissertation
Full Text:: larger than 2.5fm given by 1/30 AR × . This extension of the radius is attributed to the presence of

Stereospecific Synthesis of Stereotriad Motifs and Alkenes Using Enantioenriched sp³-Hybridized Carbenoids

Creator:: Xun, Sun
Abstract:: Enantioenriched sp³-hybridized carbenoid reagents CR1R2MX (X = nucleofuge, M = electrofuge) of different types were investigated for the synthesis of polysubstituted alkyl chains by iterative stereospecific reagent-controlled homologation (StReCH) and for the stereospecific connective synthesis of alkenes by eliminative cross-coupling. In the first part, putative enantioenriched α-chloroalkyllithiums (CHRLiCl) were employed...
Resource Type:: Dissertation
Full Text:: contiguous stereotriad motif were separately targeted by triple chain extension of B-phenethyl boronic

Dynamics and Design of Green Fluorescent Protein-Inspired Superphotoacids and Red-Emitting Fluorophores with Transient Absorption and Femtosecond Stimulated Raman Spectroscopy

Creator:: Chen, Cheng
Abstract:: In the past decades, femtosecond stimulated Raman spectroscopy (FSRS) has been gaining tremendous popularity in fundamental sciences stemming from chemistry to biology. It is capable of capturing both equilibrium and non-equilibrium structural information across a broad range of timescales with simultaneously high temporal and spectral resolutions. Femtosecond transient absorption spectroscopy...
Resource Type:: Dissertation
Full Text:: require large π-conjugation extension and hence provides space for further chemical engineering for

Cis-2,5-diaminobicyclo[2.2.2]octane : a novel C₂-symmetric scaffold for asymmetric catalysis

Creator:: Shaw, Subrata
Abstract:: This thesis describes the development of a new enantioselective synthetic method employing chiral cis-2,5-diaminobicyclo[2.2.2]octane-based organometallic catalysts. The significance of this new method to organic synthesis is illustrated with preparation of enantioenriched products that are transformed to important pharmaceutical agents. Chapter 1 provides a brief historical overview of asymmetric catalysis, especially...
Resource Type:: Dissertation
Full Text:: enantiomeric excess. Extension of this reaction to vinylic halides using the same catalyst is probed but

A study of the limitations of ultraviolet spectral data for the determination of dissociation constants of organic nitrogeneous bases

Creator:: Vachananda, Sookapracha
Abstract:: Ultraviolet spectroscopic methods for the determination of dissociation constants can only be applied to those compounds having protonatable sites conjugated with or inherent in a chromophoric group of the compound. The determination of the dissociation constants of organic nitrogeneous bases by ultraviolet spectroscopic methods was found to be only reliable...
Resource Type:: Dissertation
Full Text:: 262 5.15 262 262 262 Quinoline 232 224 224 224 224 4.90 228 312.5 228 sh 228 228 sh 232 4.80 243

ScholarsArchive@OSU

Studies toward the total synthesis of (+)-providencin

Gaseous electron-diffraction investigations : I. Development of high-temperature nozzles : II. Molecular structure and barrier to internal rotation of diboron tetrafluoride and diboron tetrabromide : III. Molecular structure and composition of 2,3-butanedione and oxalyl chloride at high temperature

Water and methanol adsorption on a series of organic complexes of montmorillonite

Synthesis, characterization, and analysis of nitroaromatic compounds

The normal vibrational analysis of polyacetaldehyde

Studying fusion reactions for effect of PCN on heavy nucleus formation and for nuclear structure effects

Stereospecific Synthesis of Stereotriad Motifs and Alkenes Using Enantioenriched sp³-Hybridized Carbenoids

Dynamics and Design of Green Fluorescent Protein-Inspired Superphotoacids and Red-Emitting Fluorophores with Transient Absorption and Femtosecond Stimulated Raman Spectroscopy

Cis-2,5-diaminobicyclo[2.2.2]octane : a novel C₂-symmetric scaffold for asymmetric catalysis

A study of the limitations of ultraviolet spectral data for the determination of dissociation constants of organic nitrogeneous bases

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