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 8 of 8 for “"Metal exchange"”.
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Complex-induced proximity effects in proton transfer and halogen-metal exchange reactions
… an acidic deuterium to a site of halogen-lithium exchange could be interpreted to show that initial halogen-lithium exchange occurs faster than loss of the acidic deuterium. However studies of the competition between halogen-metal exchange and deuterium loss for $N$-deutero-$N$-alkyl-2-, 3-, and …
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Total synthesis of nemorosone and nemorosone II
… bridgehead iodination, followed by halogen-metal exchange and benzoylation. Chapter 2 describes our total synthesisof nemorosone (4) in 13 synthetic steps and 6% overall yield. Chapter 3 describes the first total synthesis of the type C PPAP nemorosone II (150) in 10 synthetic steps and 1.5% …
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Studies on polygermanyl-transition metal (carbonyl) derivatives
… between the appropriate polygermanyl halides and metal carbonyl anions. The characterisation by infrared, Raman, n.m.r. and mass spectrometry of these compounds is discussed in detail. The physical properties and reactions have also been investigated and compared, in parallel with the parent …
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Aqueous and solid phase interactions of radionuclides with organic complexing agents
… rate of sorption, by a mechanism identified as metal exchange with matrix metals. Experiments in which excess EDTA, NTA and picolinic acid (40 – 100 fold excess) were pre-equilibrated with Th and U prior to contact with the sand, to allow a greater degree of radionuclide complex formation, …
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The geochemistry and geomicrobiology of relict hydrothermal sulphide deposits
… deposits and the role of microbes in the metal-exchange processes were investigated in metalliferous sediments from the Alvin relict hydrothermal zone in the TAG area at 26º8'N (Mid-Atlantic Ridge). The solid-phase and concomitant pore water concentrations of AI, Si,Ca, C<sub>tot</sub>, …
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Stereochemistry of small molecules: Configurational and conformational control
… other in modern stereochemistry. Chiral organometallics feature prominently in organic synthesis as reactive intermediates. The possibility of exploring their stereochemistry in synthesis is associated with the configurational stability of the metal-bearing stereogenic center. We were …