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Filtering by: O'Neill, Phil Remove constraint O'Neill, Phil Academic Affiliation Chemistry Remove constraint Academic Affiliation: Chemistry

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  • Analysis of the mechanism of sulfoxide-lithium exchange and the reactive intermediate in stereospecific reagent-controlled homologation (StReCH)

    Creator:
    Hoyt, Amanda
    Abstract:
    The stereospecific reagent-controlled homologation (StReCH) of boronic esters with enantioenriched carbenoid species generated in situ by the addition of organolithium initiators to stereodefined α-chloroalkyl aryl sulfoxides was previously reported. The reaction of an organolithium with an α-chloroalkyl aryl sulfoxide ostensibly generates an α-chloroalkyllithium via sulfoxide-lithium exchange; however, the true nature...
    Resource Type:
    Masters Thesis
    Full Text:
    (±)-(4R*,5R*)-4,5-diphenyl-1,3,2-dioxaborolanes [RB[O(CHPh)2O], R = CH2CH2Bn, c-C6H11, and Ph) with

  • Rationalization and innovative design of asymmetric organocatalysts through computational investigation

    Creator:
    Johnston, Ryne Connell
    Abstract:
    My work on computing complex catalyzed organic transformations reveals that only a few subtle chemical factors, e.g. non-classical hydrogen bonding, (hyper)conjugation and steric effects, common across different catalyst manifolds are critical for catalysis and selectivity. Rational manipulation and exploitation of these factors has led to improved catalyst designs, which has...
    Resource Type:
    Dissertation
    Full Text:
    stabilization through interaction with negatively charged atoms in a C–H···O non-classical hydrogen bond

  • Stereoselective synthesis & application of enantioenriched main group α-haloalkyl organometal reagents

    Creator:
    Emerson, Christopher R.
    Abstract:
    Sulfoxide-ligand exchange (SLE) and asymmetric halogen-metal exchange (AHME) processes were separately examined for the enantioselective synthesis of functionalized alpha-haloalkylmetal (carbenoid) reagents. Carbenoids derived from SLE were used to effect stereospecific reagent-controlled homologation (StReCH) of boronic esters and those generated via AHME were engaged in Darzens-type chemistry with aldehydes. Abstract for...
    Resource Type:
    Dissertation
    Full Text:
    . Abstract for Part 1. Scalemic syn alpha-chloroalkylsulfoxides p-TolS(O)CHClR [R = allyl, (1,3-dioxolan-2

  • Zero Kinetic Energy Photoelectron Spectroscopy of Polycyclic Aromatic Hydrocarbons

    Creator:
    Harthcock, Colin
    Abstract:
    In this dissertation, I describe spectroscopic studies of jet-cooled polycyclic aromatic hydrocarbons (PAH) and one nitrogen substituted PAH (PANH) using pulsed field zero kinetic energy (ZEKE) photoelectron spectroscopy and resonantly enhanced multiphoton ionization (REMPI) spectroscopy. Recently, there has been a demand for far-infrared (FIR) spectral information of astrophysically relevant molecules...
    Resource Type:
    Dissertation
    Full Text:
    ........................................................................................39 3.4 Experimental ZEKE spectra

  • Mass spectrometry-based identification and characterization of protein and peptide adducts of lipoxidation-derived aldehydes

    Creator:
    Chavez, Juan D.
    Abstract:
    Oxidative stress is recognized as an important underlying factor in the pathogenesis of many degenerative diseases as well as normal senescence. The free radicals, reactive oxygen species (ROS) and electrophiles produced during oxidative stress are capable of modifying nucleic acids, lipids and proteins. There are a variety of oxidative modifications...
    Resource Type:
    Dissertation
    Full Text:
    oxidative stress, as well as regulators of cell death. We were able to identify 39 unique sites on 27

  • Studies on the synthesis and characterization of polymer-containing nanocomposite materials

    Creator:
    Oriakhi, Christopher O., 1960-
    Resource Type:
    Dissertation
    Full Text:
    Characterization of Polymer-Containing Nano comp o site Materials. Abstract approved: Micheal M. Lerner

  • Thermal [pi]-route rearrangement of 4-cycloheptane-1-methyl acetate

    Creator:
    Schick, Lawrence Edward
    Abstract:
    Pyrolysis of 4-cycloheptene-l-methyl acetate under flow conditions at 285° gives only rearranged bicyclic acetates and hydrocarbons rather than the anticipated simple elimination product methylenecyclohept- 4-ene. These rearranged acetates have the same structures and are formed in virtually the same relative percentages as those observed in the "π- route" solvolysis of...
    Resource Type:
    Dissertation
    Full Text:
    clearly demonstrated to be a homogeneous unimolecular gas phase reaction. Pyrolysis of 4- cyc,o _eptene

  • Graphite intercalation compounds containing fluoroanions

    Creator:
    Katinonkul, Watcharee
    Abstract:
    New chemical synthesis strategies have been investigated for the preparation of acceptor-type graphite intercalation compounds (GIC's) with fluoroanions in order to obtain new materials and to develop a better understanding of the synthetic approaches and properties of the products. New GIC's containing borate chelate anion such as bis(oxalato)borate, CxB[OC(O)C(O)O]₂•δF, are...
    Resource Type:
    Dissertation
    Full Text:
    properties of the products. New GIC’s containing borate chelate anion such as bis(oxalato)borate, CxB[OC(O

  • Structure-property relationships in oxides containing select platinum group metals

    Creator:
    Gatimu, Alvin J.
    Abstract:
    Oxide materials exhibit a wide variety of structures and properties. In particular, transition metal oxides tend to be highly stable while exhibiting a wide range of properties that can be used for numerous applications. This work focuses on investigating how the structures’ of 4d and 5d transition metal oxides influences...
    Resource Type:
    Dissertation
    Full Text:
    Transition within the Pb3Rh7-xMnxO15 Solid Solution........... 39 2.3.1 Introduction

  • Synthesis and study of transparent p- and n-type semiconductors and luminescent materials

    Creator:
    Park, Cheol-Hee
    Abstract:
    New transparent p- and n-type semiconductors and luminescent materials have been prepared and characterized. Synthesis, structures, optical and electrical properties of new chalcogenide fluoride p-type transparent semiconductors MCuQF (M=Ba, Sr; Q=S, Se, Te) are described. Band-gap tuning and improvement in conductivity through p-type doping are demonstrated in the family. The...
    Resource Type:
    Dissertation
    Full Text:
    ................................................................... 38 References ........................................................................... 39