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 5 of 5 for “"dimethylcarbonate"”.
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The directed ortho-lithiation of lithium phenylsulfide and lithium phenylselenide plus sigma-aromaticity and the hexakis(phenylseleno)benzene dication
… chloride, methyl iodide, thioxanthone, and dimethylcarbonate) form ortho-substituted products. The treatment of dilithium benzene-1,2-diselenolate with methylene chloride and 1,2-dibromoethane forms 1,3-benzodiselenole (70.4% yield) and dihydro-1,4-benzodiselenin (54.6% yield), respectively. …
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Non-isocyanate routes to urethane-polymers
… reaction of diamines with ethylenecarbonate or dimethylcarbonate. In addition to the more conventional di-functional carbamate-blocks, the synthesis of a novel mono-carbamate based on an amino acid has been investigated. The mechanism of the polymerization of adipic acid and hexane diol was …
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A Study of the Interaction of some cationic Transition-Metal compounds with Carbon Monoxide and Nucleophiles
… to give [Ru(CO)3(PPh3)2) and a trace amount of dimethylcarbonate. The same compound is obtained by using triethylamine in methanol under CO (10 atmospheres) at 65-70 C. Dimethylcarbonate rapidly reacts with Cl^ONa in contact with air to form a white<br/>precipitate, suggested to be Na2COj. …
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Synthesis of novel cylic monomers for hydrogel polymers
… also explored. Copolymerisation of diacetate, dimethylcarbonate and dipivalate derivatives of cis-DHCD with HEMA, to form a hitherto unknown group of hydrogels, is reported. Hydrogels containing these monomers showed significant improvements in both tensile strength and Youngs modulus, at both …
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Heterogeneous catalysis in the different reactor types on the examples of ethyl benzene to styrene, methane dehydroaromatization and propylene carbonate, methanol transesterification
The dissertation is based on the three above mentioned projects. Different types of reactors for heterogeneous catalysis were applied in this work – fixed and fluidized bed rectors as well as a riser reactor. Many parameters as e.g. contact times, temperature control, catalyst regeneration …