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Showing 1 to 7 of 7 for “"catalysis chemistry"”.
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Rh-Based Catalysis Chemistry of Aqueous-Phase Nitrogen Treatment Reactions
… effect of reaction conditions on the catalytic chemistry. Pd expectedly showed high reduction activity and high N2 selectivity at low pH, and near inactivity at high pH. Rh, while inactive at low pH, showed moderate activity and high NH4+ selectivity at high pH. Hydrazine (N2H4) was also …
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Proposed Route to Cyclopenta[c]thiophenes via Activated Methylene
… show promise in the field of polymer and catalysis chemistry. These substituted polythiophenes are potential organic semiconductors and anti-tumor agents. The research presented shows the successful and novel conversion of 3,4-bis(chloromethyl)-2,5-dimethylthiophene and …
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The aerobic, water-assisted selective oxidation of methane over platinum-based catalysts
… remains one of the grand challenges of catalysis chemistry, due to the difficulty in attaining high selectivities at high methane conversions. This has been attributed to the higher reactivity of methane oxidation products compared to methane itself, which therefore leads to their facile …
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Borox catalysis : a new frontier in chiral Bronsted acid catalysis derived from chiral borate anions
… supported by NMR spectroscopy, computational chemistry and X-ray analysis. Lastly, a new mechanism has been examined for the imino-aldol reaction using computational chemistry. This mechanism supports the idea of a Lewis acid assisted Brønsted acid catalyzed reaction.
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The Synthesis and Application of a Chiral Sulfonated Phosphine Ligand to Asymmetric Transition-Metal Catalysis
… application in asymmetric transition-metal catalysis. sSPhos is a dialkylbiaryl phosphine ligand bearing a sulfonate group. This sulfonate group can engage in non-covalent interactions, allowing sSPhos to influence site- and enantioselectivity when employed as a ligand for transition-metal …
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Density functional theory investigation into mechanisms of metal ion-promoted and base-promoted phosphorothioate cleavage reactions and Lanthanide ion catalysts for kinetic resolution of amino acid esters
Described here are chiral Ln3+ complexes of Schiff-base ligands and their use as catalysts for the kinetic resolution of the 4-nitrophenyl esters of N-Boc glutamine and phenylalanine through an enantioselective methanolysis/ethanolysis reaction. Catalysts were screened in various solvents and …
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The Application of Catalysis based on Hydrogen Bonding and Ion-pairing Interactions to Asymmetric Minisci-type Alkylations of Azines and Iridium-Catalysed C-H Borylation.
… and enantioselectivity challenges in synthetic chemistry. The most widely used interactions, hydrogen bonding and ion-pairing, are employed in this thesis for the accomplishment of two important transformations in an enantioselective manner. The directionality of hydrogen bonding makes it a …