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Showing 1 to 20 of 238 for “"Isomerization."”.
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Selective deconstruction of polyethylene to propylene via isomerization/metathesis and 1-hexene isomerization studies
… catalytic process combining dehydrogenation, isomerization and metathesis. Chapter 1 outlines the limitations of current recycling strategies and introduces chemical recycling as a promising route toward closed-loop, polymer-to-polymer reuse. Chapter 2 highlights a tandem …
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Isomerization of cycloalkanes under carbonium ion conditions
Thesis (M.S.)--Michigan State University. Dept. of Chemistry, 1963
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Multicomponent Heterocycle Syntheses Based upon Sonogashira Coupling-Isomerization
Die Studien zur Optimierung der Kupplungƒ{Isomerisierungsƒ{Reaktion (KIR); Eintopf, MultikomponentSynthese von Heterozyklen
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Mechanochemical Reaction Development for Addition, Elimination, and Isomerization
… of three types: addition, elimination, and isomerization.Mechanical forces have been used previously to activate latent catalysts by accelerating dissociation of an inhibiting ligand, but tuning catalytic activity by force remains limited to a single demonstration of force-dependent …
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Synthesis of Deoxysugars through Manganese-promoted Redox Isomerization
… 2- and 4-deoxysugars using a Mn-promoted redox isomerization step that avoids lengthy protecting group manipulations. We determine the resting state of the manganese catalyst to be Mn(II). We demonstrate subsequent derivatizations with the ketone moiety to access branched sugars and amino sugars …
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Analysis of enzymatic L/D-peptide isomerization in animals
… a D-amino acid residue in the peptide chain. Isomerization leads to important changes in the three-dimensional structure and bioactivity of the DAACP and increases its resistance to degradation by peptidases. However, current research into peptide isomerization is limited because this PTM is …
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Catalysts for the Positional Isomerization of Internal, Long-Chain Olefins
Double-bond isomerization of internal C16-C18 olefins is a necessary step in the production of paper sizing agents. In this work, the properties that enable long-lasting solid acid catalysts (both commercial and lab-synthesized) were identified, the efficacy of regenerated solid acid catalysts was …
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Polymerization and Isomerization of Olefins using Late-Transition Metal Complexes
… that serve as olefin polymerization and isomerization catalysts. Sandwich-diimine palladium catalysts were used to selectively isomerize 1-olefins to 2-olefins. By activating the palladium catalyst with phenylsilane and NaBArF, a broad range of olefins were isomerized at low catalyst …
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Synthesis, Characterization, and Reactivity of Alkylphosphomolybdates: Oxidation, Dehydration, and Isomerization
The alkyl and silyl phosphomolybdates (P$\sb3$O$\sb9$)MoO$\sb2$OR((n-C$\sb4$H$\sb9)\sb4$N) $\sb2$ $\{$R = CH$\sb3$, CH$\sb2$CH$\sb3$, 1, CH(CH$\sb3)\sb2$, CH$\sb2$CH=CH$\sb2$, CH$\sb2$CH$\sb2$C$\sb6$H$\sb5$, and Si(CH$\sb3)\sb3\}$ have been prepared and characterized. A single crystal X-ray …
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Kinetics of base-catalyzed isomerization and hydration of butadiene sulfones
The kinetics of base-catalyzed isomerization and hydration of butadiene sulfones has been studied by using the gas chromatographic method. The reaction has been shown to be first-order with respect to each of the three components, i.e., α-butadiene sulfone, β-butadiene sulfone, and alcohol, in this …
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The study of the isomerization of trans-3-acetoxy-2-bromocyclooctene
<p>The isomerization of trans-3-acetoxy-2-bromocyclooctene (trans-1) to cis-3-acetoxy-2-bromocyclooctene (cis-1) was studied, trans-3- Methoxy-2-bromocyclooctene (trans-2) was used as a model compound for comparison. The rate of isomerization of both compounds increased tremendously with iodine …
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Enhancing thermal isomerization rates of redox auxiliary-appended azobenzenes via redox auxiliary catalysis
… RA greatly reduces the energetic barrier to ZE isomerization. The newly formed (E) RA•+ azo molecule will oxidize a neutral (Z) RA azo, generating a (Z) RA•+ azo radical cation. This (Z) RA•+ azo will undergo rapid ZE isomerization to yield another (E) RA•+ azo molecule, which will oxidize …
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Spectroscopy and theory of cis-trans isomerization in the S₁ state of acetylene
… a prototypical system for the study of cis-trans isomerization, the barrier to which is moderately low in the Si state, presenting the opportunity to achieve a complete understanding of the global rovibrational dynamics of an isomerizing system. Our analysis of the spectra of ungerade vibrational …
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Mechanisms of Methoxide Ion Substitution and Acid- Catalyzed Z/E Isomerization of N-Methoxyimines
… and diethyl malonate. Acid-catalyzed isomerization of compounds containing the O-methyloxime moiety have been investigated with ab initio calculations (HF/6-31+G*, MP2/6- 31+G*//HF/6-31+G*, B3LYP/6-31+G*//HF/6-31+G*). Barriers for rotation around the C-N bond following protonation have …
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Studies on the Mechanism of Isomerization of Methylmalonyl-Coenzyme-a to Succinyl-Coenzyme-a
Made available in DSpace on 2014-12-05T17:47:53Z (GMT). No. of bitstreams: 1 6402877.pdf: 3207452 bytes, checksum: 0fd6f933a02fa70a200d8818a985de18 (MD5) Previous issue date: 1963
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