title: On the concept of hemilability: insights into a donor-functionalized iridium(I) NHC motif and its impact on reactivity.
abstract: Novel iridium(I) complexes bearing N-donor-functionalized N-heterocyclic carbene ligands were synthesized. Although hemilabile coordination of the attached donor is considered beneficial in catalysis, no detailed study of this phenomenon in these systems is available to date. The present report provides insight into the hemilabile bonding properties of a N,N'-bis(pyridin-2-yl)-imidazolylidene (NCN) ligand motif on iridium(I). In most cases, the presented compounds exhibit rare fluxional hemilabile coordination of the N donor, and remarkable performance in catalytic transfer hydrogenation is observed. Further, extensive reactivity studies often led to unexpected products.
authors.affiliation: Chair of Inorganic Chemistry/Molecular Catalysis, Catalysis Research Center, Technische Universität München , Ernst-Otto-Fischer-Straße 1, 85747 Garching bei München, Germany.
authors.forename: Korbinian
authors.initials: K
authors.lastname: Riener
authors.forename: Mario J
authors.initials: MJ
authors.lastname: Bitzer
authors.forename: Alexander
authors.initials: A
authors.lastname: Pöthig
authors.forename: Andreas
authors.initials: A
authors.lastname: Raba
authors.forename: Mirza
authors.initials: M
authors.lastname: Cokoja
authors.forename: Wolfgang A
authors.initials: WA
authors.lastname: Herrmann
authors.forename: Fritz E
authors.initials: FE
authors.lastname: Kühn