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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.

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Showing 1 to 20 of 70 for “"Carbon atom"”.

  1. I. Quinoxaline Formation and the Ortho Effect II. Hindrance at the Beta Carbon Atom

    Soper, Quentin FrancisUniversity of Illinois at Urbana-Champaign1943

    uiuc Repository record

  2. Palladium and platinum complexes of substituted 4-vinylcyclohexene

    Chinn, Donald Y.2018

    … nature of the bonding of olefins to metal atoms seemed to involved the interaction between pi electrons in the unsaturated molecule and the hybrid orbitals of the metal rather than a localized sigma bonds between the metal atom and a particular carbon atom. The metal was complexed to a …

    u-pacific Repository record

  3. Hypervalent Trigonal Bipyramidal Carbon

    Forbus, Thomas Reginald, Jr.University of Illinois at Urbana-Champaign2014

    … a hypervalent trigonal bipyramidal (TBP) carbon atom. Structural features common to these structures which are

    uiuc Repository record

  4. Stiffness matrices of carbon nanotube structures

    Samaroo, Kirk J. (Kirk Jerome)Massachusetts Institute of Technology2005

    … of graphene, the planar building block of carbon nanotubes. Through continuum linear elastic analysis and a displacement-based finite element method, the global in-plane stiffness matrix for an arbitrary carbon atom of the lattice was found. The matrix provides the atomic level forces …

    mit Repository record

  5. Reactions of Hindered Phenols with Unsaturated Hydrocarbons in the Presence of Free Radicals

    Kularatne, Kulugammana W.S.Aston University1977

    … that of TEC by the attachment of the benzylic carbon atom to the allylic carbon atom of natural rubber, Tensile measurements, oxygen absorption tests and stress relaxation measurements have been used to evaluate the antioxidant activity of the bound antioxidants. Comparison of their …

    aston Repository record

  6. Synthetic studies towards an organometallic rotaxane

    Mare, Jacques Simon FifeDepartment of Chemistry1996

    … the transition metal is covalently bonded to a carbon atom of an alkyl group. The formation of a rotaxane using the host cyclophane, cyclobis (paraquat-pphenylene), formed by a template effect, has been investigated using our chiral organometallic polyether.

    cape-town Repository record

  7. Engineering of an efficient and enantioselective biocatalyst for the preparation of chiral pharmaceutical intermediates

    Tang, Weng LinUniversity of Illinois at Urbana-Champaign2011

    … enantioselective hydroxylation of non-activated carbon atom, a useful but challenging reaction for the synthesis of chiral pharmaceutical intermediates. Our target enzyme is the novel P450pyr enzyme from Sphingomonas sp. HXN-200 that was found to catalyze the regio- and stereoselective …

    uiuc Repository record

  8. CHEMICAL AND ENZYMATIC INVESTIGATIONS OF THE MECHANISM OF THE REMOVAL OF THE 14ALPHA-METHYL GROUP OF LANOSTEROL

    PASCAL, ROBERT ANTHONY, JR.Rice University1980

    … enzymatic removal of the 14(alpha)-methyl group (carbon atom 32) of lanosterol during the biosynthesis of cholesterol. A comparison of the in vitro metabolism of {2,4-('3)H}14(alpha)-hydroxymethyl-5(alpha)-cholest-7-en-3(beta)-ol (I) and …

    rice Repository record

  9. ΜΕΛΕΤΗ ΑΝΤΙΔΡΑΣΕΩΝ 1,3-ΔΙΠΟΛΙΚΗΣ ΚΥΚΛΟΠΡΟΣΘΗΚΗΣ ΣΕ ΕΤΕΡΟΚΥΚΛΙΚΑ ΣΥΣΤΗΜΑΤΑ

    Θεσσαλονικέως, ΕλισάβετΑριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)1990

    … CENTER OF THE DIPOLE IS JOINED WITH THE TERTIARY CARBON ATOM OF OXAZOLONE-OR THIAZOLONE-RING. THE STRUCTURE OF THESE NEW COMPOUNDS WAS CONFIRMED BY SPECTROSCOPIC DATA AND BY CHEMICAL METHODS.THE OBSERVED REGIOCHEMISTRY IS ALSO RATIONALIZED BY FRONTIER MOLECULAR ORBITALCONSIDERATIONS OF THE …

    greece Repository record

  10. THE PHOTOISOMERIZATION OF 2-PHENYL-3H-INDOL-3-ONE N-OXIDE (2- PHENYLISATOGEN) TO 2-PHENYL-4H-3,1-BENZOXAZIN-4-ONE

    Squire, Richard HuffmanWake Forest University2016

    … that allows the nitrone oxygen to migrate past a carbon atom in a ring and insert itself into a ring that is expanded by the oxygen. While the process occurs for a number of six-membered rings, there is only one known five member ring expansion which seems to offer a possible mechanism. This …

    wfu Repository record

  11. Aufklärung des Einflusses von C7 und C8 Aromaten auf die Partikelbildung im Abgas von Ottomotoren mit Direkteinspritzung sowie Entwicklung eines Screeningverfahrens zur Vorhersage der Partikelbildung

    Klose, Johanna2026

    … from toluene show that the radical-carrying carbon atom of the tropyl radical would first have to undergo rehybridization from a sp2 to a sp3 hybridized carbon atom in order to be incorporated into the soot structure. Another focus of the work was the prediction of particle formation. For …

    tu-berlin Repository record

  12. The characterization and kinetics of N-formyl-N-methylaminomethenylpentaaquochromium(III) ion

    White, James Dean1979

    … sigma bonded to an sp<sup>3</sup>hybridized carbon atom. D. Biggs, of L. Speer's research group, attempted to synthesize a complex containing chromium sigma bonded to an sp<sup>2</sup> hybridized carbon atom.<sup>5</sup> This was attempted by reacting chromium (II) perchlorate with …

    u-pacific Repository record

  13. Decomposition of [delta]³-dihydropyran -dihydropyran over hot alumina

    McInnis, Raymond G.Boston University1962

    … the tetrahydrofurfuryl alcohol is labeled with carbon-14 on the external methylene carbon atom, the resulting delta^2 -dihydropyran is labeled in approximately equal proportions on position 2 and on position 6. In addition delta^2 -dihydropyran labeled with carbon-14 on position 6 rearranges …

    bu Repository record

  14. Nucleophilic displacement reactions of some carbohydrates in dimethyl sulphoxide

    Muyobela, Mwamba T. Benny2011

    … to study their reactions with sodium hydrogen carbonate in dimethyl sulphoxide. Similar reactions are known to convert acylic primary sulphonates and iodides to aldehydes but the sugar derivatives were observed to yield different products. Detosylation of the sugars to give the corresponding …

    zimbabwe Repository record

  15. Nucleophilic displacement reactions of some carbohydrates in dimethyl sulphoxide

    Muyobela, Mwamba T. Benny2011

    … to study their reactions with sodium hydrogen carbonate in dimethyl sulphoxide. Similar reactions are known to convert acylic primary sulphonates and iodides to aldehydes but the sugar derivatives were observed to yield different products. Detosylation of the sugars to give the corresponding …

    zambia Repository record

  16. The chemistry of some polysubstituted derivatives of di - and triphenylmethane dyes

    Humpston, John RobertPreston Polytechnic1982

    … interaction of substituents with the central carbon atom to be examined.

    cent-lancashire Repository record

  17. 1. The Endocyclic Restriction Test: Oxygen Transfer From N-Sulfonyl Oxaziridines to Alkenes and Fluorine From N-Fluorosultams to Carbanions. 2. Intra- and Intermolecular Kinetic Isotope Effects in Directed Lithiations

    Anderson, David R.University of Illinois at Urbana-Champaign2015

    … of hydrogen transfer from a benzylic or aryl carbon atom to organolithium reagents has been investigated by measuring intra- and intermolecular kinetic isotope effects. The results were more in line with a two-step mechanism where an organolithium base coordinates to the heteroatom of the …

    uiuc Repository record

  18. Remote Lithiations of Carboxamides: The Manifestation of a Post-Complexation Proximity Effect (Homoenolate)

    Hunter, James EdwardUniversity of Illinois at Urbana-Champaign2014

    … substitution occurs at a (beta) secondary carbon atom. The allylic alkyllithium generated undergoes electrophilic at the (beta) or (delta) position. Lithiation and substitution at the (gamma) position occurs upon treatment of N,N-diisopropyl-2-methyl-4-phenylthiobutanecarboxamide (193), …

    uiuc Repository record

  19. Adsorption of water and carbon monoxide on Cu₂O(111) single crystal surfaces

    Christiaen, Anne-ClaireVirginia Tech1994

    … to bind molecularly to the surface through the carbon atom and with a heat of adsorption of 22 kcal/mol, higher value than that of CO on Cu₂O(100) (16.7 kcal/mol). This suggests that the local geometry of adsorption sites may play an important role in the way CO binds to Cu₂O surfaces. …

    vt Repository record

  20. Characterization and control of ketonic rancidity in the lauric acid oils.

    Hatton, Paul.Sheffield Hallam University (United Kingdom).1989

    … butterfat. It arises when short and intermediate carbon chain length fatty acids (C6 to C14) are converted into methyl ketones (C5 to C13) by certain fungi. Ketonicrancidity will not occur in fats and oils that do not contain these fatty acids. Fermentation experiments with whole oils and simple …

    sheffield-hallam Repository record

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