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Cyclopentadienyl-functionalised N-heterocyclic carbenes: synthesis, coordination to Mo, Ru, Rh
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This thesis deals with the synthesis of cyclopentadienyl-functionalised
N-heterocyclic carbenes and its coordination to both middle and late
transition metals. One of the goals was to gain chemical knowledge on
the reactivity patterns of these complexes, and explore their potential
applications in catalysis.
The imidazolium salts synthesised in the course of this thesis
represent a series containing changes in the electronic and steric
parameters. The ligand precursors were coordinated to molybdenum,
ruthenium, rhodium and iridium. These organometallic complexes were
studied in homogeneous catalysis processes such as: olefin epoxidation
(Mo), isomerisation of allylic alcohols (Ru), b-alkylation of alcohols, Nalkylation
of amines and transfers hydrogenation of ketones (Ir).(...)
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Dissertation presented to obtain the Ph.D degree in Chemistry
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Universidade Nova de Lisboa. Instituto de Tecnologia Química e Biológica