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Synthesis and reactivity studies of cationic Ir(III) alkylidines. α-hydride abstraction reactions

AuthorsCampos, Jesús ; Carmona, Ernesto
Issue Date2017
PublisherSociedad Química de México
CitationJournal of the Mexican Chemical Society 61: 77- 89 (2017)
AbstractThe chemistry of late transition metal alkylidenes [M=CR], where R is H a hydrocarbyl group, have attracted widespread attention although mainly with reference to complexes of metals in low oxidation state. We focus in this paper on reactions based on electrophilic attacks by PhC that allow either isolation of stable cationic Ir(III) alkylidenes, considerably more attractive than well-known Ir(I) counterparts, or the generation of very reactive variants that experience fast migratory insertion into existing Ir-C and Ir-H sigma bonds. The present studies are based on (η-CMe)Ir(III) complexes that bear a cyclo-metalated PMeXyl ligand (Xyl = 2,6-MeCH). The contribution of different monoanionic ligands (chloride, alkyl or hydride) to either stabilize the Ir=CR linkage or provide facile reactivity routes has been investigated, including the use of various deuterium isotopologues of the iridium complex precursors.
Identifiersissn: 1665-9686
Appears in Collections:(IIQ) Artículos
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