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<dc:title xml:lang="fr">Synthèse et réactivité de nouveaux complexes des métaux du groupe 13 portés par des ligands carbènes N-hétérocycliques</dc:title>
<dcterms:alternative xml:lang="en">Synthesis and reactivity of group 13 metals complexes supported by N-heterocyclic carbenes</dcterms:alternative>
<dc:subject xml:lang="fr">Chimie organométallique</dc:subject>
<dc:subject xml:lang="fr">Métaux du groupe 13</dc:subject>
<dc:subject xml:lang="fr">Carbène N-hétérocyclique (NHC)</dc:subject>
<dc:subject xml:lang="fr">Complexe NHC anormaux</dc:subject>
<dc:subject xml:lang="fr">Complexe mésoionique</dc:subject>
<dc:subject xml:lang="fr">Complexes dicarbènes N-hétérocycliques (NHDCs)</dc:subject>
<dc:subject xml:lang="fr">Paires de Lewis frustrées (FLPs)</dc:subject>
<dc:subject xml:lang="fr">Réactif de Tebbe</dc:subject>
<dc:subject xml:lang="en">Organometallic chemistry</dc:subject>
<dc:subject xml:lang="en">Group 13 metals</dc:subject>
<dc:subject xml:lang="en">N-heterocyclic carbene (NHC)</dc:subject>
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<dc:subject xml:lang="en">Frustrated Lewis Pairs (FLPs)</dc:subject>
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<tef:elementdEntree autoriteExterne="167466356" autoriteSource="Sudoc">Carbènes N-hétérocycliques</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="030024013" autoriteSource="Sudoc">Complexes métalliques</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="031580726" autoriteSource="Sudoc">Chimie organométallique</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Au début de ces travaux, peu d’études avaient été faites sur la complexation des carbènes N-hétérocycliques avec des métaux oxophiles, électropositifs et à hauts degrés d’oxydation tel que les métaux du groupe 13. L’optimisation de voies de synthèse a permis d’étendre le nombre de complexes de types NHC-MIII (M = aluminium, gallium et indium), ainsi qu’à des complexes cationiques. L’association de ces précurseurs avec des NHCs plus encombrés a permis l’observation de réactivités sans précédent (complexes anormaux, paires de Lewis frustrées, dicarbènes N-hétérocycliques). Dans un second temps, la réactivité inhabituelle des ligands NHCs a permis l’isolation d’analogue au réactif de Tebbe, très actifs en méthylénation de dérivés carbonyles.</dcterms:abstract>
<dcterms:abstract xml:lang="en">At the beginning of this work, few studies had been performed on the complexation of N-heterocyclic carbenes with oxophilic metals, in high oxidation states such as group 13 metals. The synthetic routes optimization has extended the number of complexes-type NHC-MIII (M = aluminum, gallium and indium), and the corresponding cationic complexes. The combination of these precursors with sterically congested NHCs allowed the observation of unprecedented reactivities (abnormal complexes, Frustrated Lewis Pairs, N-heterocyclic dicarbenes). In a second step, the unusual reactivity of NHC ligands has allowed the isolation of analogues of the Tebbe’s reagent, formed to be very active in the methylenation of carbonyl compounds.</dcterms:abstract>
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