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Showing 1 to 20 of 217 for “"Lewis acid"”.

  1. Lewis Acid Activation of Phosphane

    Baker, Matthew G.ETH Zurich2018

    ethz Repository record

  2. Lewis acid catalysis in organic synthesis

    Alleti, RameshUniversity of Missouri--Rolla2016

    "Gadolinium triflate (Gd(OTf)₃) was found to be a simple and efficient catalyst for the acetylation of alcohols and amines in both conventional organic solvents and as well as in room temperature ionic liquids (TRIL). Acetylation reactions using acetic anhydride as the reagent proceed in excellent …

    must-thes Repository record

  3. Studies on Lewis Acid-Base Adducts

    Maier, Thomas O.University of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-10T23:01:16Z (GMT). No. of bitstreams: 1 7212280.pdf: 2128123 bytes, checksum: ac28befff6af3744a04c1efac9d7532f (MD5) Previous issue date: 1971

    uiuc Repository record

  4. Gas Phase Lewis Acid-Base Interactions

    Sacks, Lawrence JoshuaUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-09T17:35:07Z (GMT). No. of bitstreams: 1 6503665.pdf: 4735633 bytes, checksum: 52109a08d7e92e8f90ec7b5e4956af0d (MD5) Previous issue date: 1964

    uiuc Repository record

  5. Calorimetric Investigations of Lewis Acid-Base Interactions

    Guidry, Richard MartinUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-10T23:01:56Z (GMT). No. of bitstreams: 1 7500316.pdf: 3856228 bytes, checksum: 8a099174383142d44c149312c85aecba (MD5) Previous issue date: 1974

    uiuc Repository record

  6. The Lewis Acid Properties of Titanium-Tetrafluoride

    Chandler, John AllardUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-05T19:37:13Z (GMT). No. of bitstreams: 1 6000156.pdf: 3320366 bytes, checksum: 789b42765e2f9190645b95d900ee555a (MD5) Previous issue date: 1959

    uiuc Repository record

  7. Structure and Stability of Lewis Acid-Base Adducts

    Mcmillin, David RobertUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-10T23:01:46Z (GMT). No. of bitstreams: 1 7412107.pdf: 3678385 bytes, checksum: 03c7077b9aba6d33acf0f4ffd31d4b13 (MD5) Previous issue date: 1973

    uiuc Repository record

  8. Soft Lewis acid catalyzed cycloisomerization of oxo-alkynes and enynes

    Wang, Zezhou

    mtu Repository record

  9. Carbon-Carbon Bonds Formed by Lewis Acid Catalysis or Photoactivation

    Donald, Clayton PaulUniversity of Houston2024

    … from propargylic alcohols, organoboronates, and Lewis acids. Lewis acids can also be used to facilitate a mild Friedel-Crafts reaction between electron-rich aromatics and allylic or benzylic alcohols. Moreover, these methods can be applied to the synthesis of natural products. Finally, …

    houston Repository record

  10. Nuclear Quadrupole Resonance Spectroscopy of Pyridine Lewis Acid-Base Complexes

    Rubenacker, Gerald VictorUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-13T20:10:50Z (GMT). No. of bitstreams: 1 8009152.pdf: 4399371 bytes, checksum: 166830e1084ef1dc8d40469273ca119e (MD5) Previous issue date: 1979

    uiuc Repository record

  11. Cooperative activation of biomass-derived oxygenates with Lewis acid zeolites

    Lewis, Jennifer DanielleMassachusetts Institute of Technology2017

    … of oxygenated molecules owing to the unique Lewis acid character of their tetrahedral metal sites. Through fluoride-mediated synthesis, hydrophobic Lewis acid zeolites can behave as water-tolerant catalysts, which has resulted in a recent surge of experimental and computational studies in the …

    mit Repository record

  12. Catalytic implications of confined solvent ensembles within Lewis acid zeolites

    Johnson, Blake A.Massachusetts Institute of Technology2025

    Lewis acidic zeolites are microporous crystalline materials that offer promise as catalysts for the activation and conversion of biomass-derived precursors in the liquid-phase due to their unique water-tolerance and synthetic versatility. The active site environment in zeolite catalysts is …

    mit Repository record

  13. Lewis-acid behaviour of neutral and cationic fluoridotungsten(V) and (VI) complexes

    Turnbull, Douglas, University of Lethbridge. Faculty of Arts and Science2020

    lethbridge

  14. Probing the Impact of Solvent on Lewis Acid Catalysis via Fluorescent Lewis Adducts

    Laturski, Amy Elizabeth2021

    … have been developed to measure the strength of a Lewis acid. However, a major challenge for these measurements lies in the complexity that arises from variables, such as solvent and other fundamental interactions, as well as perturbations of Lewis acids as their reaction environment changes. …

    york Repository record

  15. Thermodynamic and Spectroscopic Studies of Reactivity and Bonding in Transition Metal Lewis Acid-Base Systems

    Li, Marinda PasadenaUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-13T20:09:53Z (GMT). No. of bitstreams: 1 7624127.pdf: 5375608 bytes, checksum: 63bf60c28ac8ad23c1ea568d2c74ac14 (MD5) Previous issue date: 1976

    uiuc Repository record

  16. Lewis-acid and fluoride-ion donor properties of SF₄ and solid-state NMR spectroscopy of Me₃SnF

    Chaudhary, Praveen, University of Lethbridge. Faculty of Arts and Science2011

    lethbridge

  17. Studies in Asymmetric Catalysis: Lewis Base catalyzed/Lewis Acid Mediated Aldol Reactions of Ketone- and Amide Derived Nucleophiles

    Heemstra, John Richard, JrUniversity of Illinois at Urbana-Champaign2015

    Additionally, the use of the silicon tetrachloride---chiral phosphoramide system has proven a competent catalyst for highly selective vinylogous aldol reactions between dienolates derived from a variety of alpha,beta-unsaturated carbonyl compounds to aldehydes. These reactions provided high levels …

    uiuc Repository record

  18. Stress relief: Exercising Lewis acid catalysis for donor-acceptor cyclopropane ring-opening annulations, a basis for new reaction methodologies

    Cavitt, Marchello AlfonzoGeorgia Institute of Technology2015

    … other relevant scaffolds. Unique, efficient, Lewis acid-catalyzed intramolecular cyclization strategies for the construction of functionalized polycycles using Friedel-Crafts-type alkylation sequences are presented to expand the reaction repertoire of the molecular architect. Generally, …

    gatech Repository record

  19. Utilising Boron containing Lewis Acid Functions as "Stores" for Hydride and Other functional groups and its impact on Catalytic Reactions

    Iannetelli, Angelo2020

    Transition metal mediated reactions play a vital role in the catalysis of many chemical transformations. Whilst most of these transformations occur at the metal centre, with ligands acting as spectators, new systems incorporating the direct involvement of coordinated ligands within catalytic cycles …

    southwales Repository record

  20. On the Stereochemistry of Allylmetal-Aldehyde Condensations (Allyltrimethylsilane, Allyltributylstannane, Homoallylic Alcohols)

    Weber, Eric JohnUniversity of Illinois at Urbana-Champaign2014

    … of double bonds was observed with the Lewis acid catalyzed reaction of 3a. The selectivity for 4 was dependent on Lewis acid. Cyclization induced by fluoride ion resulted in a stereochemical reversal. The Lewis acid and heat induced cyclization of 3b gave a large preference for the syn …

    uiuc Repository record

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