Global ETD Search
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 11 of 11 for “"Ethylenes"”.
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Reactions of Halogenated Ethylenes on the α-Cr₂O₃ (101̅2) Surface
The thermally induced reaction of halogenated ethylenes on the α-Cr₂O₃ (101̅2) single crystal surface results in the formation of gas phase hydrocarbons including acetylene, ethylene, butadiene, and dihydrogen, and deposition of surface chlorine adatoms. No surface carbon or combustion products are …
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Decomposition of chlorinated ethylenes and ethanes in an electron beam generated plasma reactor
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1996.
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The Reactions of Oxygen Atoms and Monofluoromethylene Radicals with Fluorinated Ethylenes in the Gas Phase
… of CHF radicals with all the fluorinated ethylenes. Relative rate constants for the reaction with propylene and fluoroethylenes were measured by a competitive method. at 23 + 2°c. The results are summarized below <TABLE>
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Observation of the first titanium alkyl/alkyl complexes: The key intermediate in the Ziegler-Natta mechanism for the polymerization of alkenes
… the oxidative coupling of two coordinated ethylenes followed by $\beta$-hydrogen abstraction and reductive elimination. Interestingly, there is no insertion of ethylene into the Ti-CH$\sb3$ bonds. This behavior is probably a general feature of d$\sp2$ metal centers.
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Large Polymers that Behave Like Small Polymers
… Meanwhile, flexible monomer units like ethylenes and siloxanes create soft, flexible plastics at the expense of thermal and mechanical robustness. Synthesizing polymers with novel architectures can overcome these challenges by creating materials with a unique set of properties and thus …
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Novel Photochemical Methodologies for Diversity Oriented Synthesis and Screening of Combinatorial Libraries
… of heterocyclic chalcones and other benzoyl ethylenes to a variety of dienes, followed by the <em>Paternò-Büchi</em> reaction, was described as an alkene-carbonyl oxametathesis. This methodology offers a rapid increase in molecular complexity and diversity of the target scaffolds.</p> <p>To …
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Synthesis of Aryl Ynol Ethers and Their Synthetic Applications
Ynol ethers are known as very important synthetic intermediates that are widely used in the syntheses of natural products and pharmaceuticals. The ynol ethers have also been used as ideal precursors of ketenes and surrogates of alkynes with a higher oxidation state in many reactions. However, few …
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Implications for Microtubule Mediated Ethylene Effects in Pea Stem Sections
<p>The marked effects of ethylene on pea stem growth have been investigated. Low temperature mid colchicine. both known microtubule depolymerization agents, reverse the effects of ethylene in straight growth tests. Low temperature (6 C) also profoundly reduces the effects of the gas in terms of …
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Studies on extensions of tert-amino effect: Ring-fusion to bridged biaryls and steroids
Studies on extensions of tert-amino effect: Ring-fusion to bridged biaryls and steroids The term t (later tert)-amino effect was introduced by Meth-Cohn and Suschitzky to generalize the thermal isomerization of ortho-substituted tertiary anilines to benzo-fused heterocyclic systems. In type 2 …