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 7 of 7 for “"bis(carbene)"”.
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Catalytic hydrofunctionalization and small molecule reactivity at a low-valent cobalt center supported by a bis(carbene) CCC pincer ligand
… of the (DIPPCCC) pincer ligand, (DIPPCCC = bis(diisopropylphenyl-benzimidazol-2-ylidene)phenyl), a platform which provides highly-donating carbenes and an aryl carbon linkage to the coordinated metal. Multinuclear NMR spectroscopies, cyclic voltammetry, X-ray crystallography, and EPR …
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Synthesis of alkyl- and poly(ethylene)glycol linked bis-dioxocyclams from bis-chromium carbene complexes
Alkyl-linked bis-chromium carbene complexes have been prepared via deprotonation and α-alkylation of (methoxy)(methyl) chromium carbene complexes using l,n-bis-triflates as electrophiles. These bis-carbene complexes were then photolyzed with N-protected imidazolines to give protected bis-azapenams. …
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The catalytic hydrogenation of carbon-carbon and carbon-nitrogen multiple bonds by a cobalt(I) complex
… Toward this end, an electron-rich monoanionic bis(carbene) aryl pincer ligand, MesCCC, was chosen study two-election chemistry with cobalt. With the MesCCC pincer ligand platform well-suited to stabilize a range of oxidation states of cobalt (Co(III), Co(II), and Co(I)), studies into the room …
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Mechanistic studies in carbene and polyurethane chemistry
<p>The chemistry of benzylchlorocarbene was investigated through both theory and experiment. Photolysis of a phenanthrene-based precursor in an NMR tube gave evidence for isomeric beta-chlorostyrenes but not the alpha-isomer. Computations showed that insertion into the aromatic ring should have a …
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From the reactivity of Pincer CCC nickel complexes to catalysis with simple nickel salts
The student, Gabriel Espinosa Martinez, accepted the attached license on 2018-04-16 at 11:38.
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Ligand design in nickel and cobalt complexes for homogeneous catalysis
… Work with the electron-rich monoanionic bis(carbene) aryl pincer ligand (MesCCC) was also carried out to explore bond activation on low valent cobalt complexes. The catalyst (MesCCC)Co-py was found to catalytically dehydrogenate ammonia borane (AB) and other amine boranes, releasing 1.7 …
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Synthesis, characterization, and catalytic reactivity of first-row transition metal CCC pincer complexes
… favor two-electron reactivity. N-heterocyclic carbenes (NHCs) are popular strong-field ligands due to their inherent stability and oxidative robustness, especially compared to phosphines. Combining NHCs with pincer ligand frameworks provides even more stable complexes. Therefore, we …