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• W2213220822 abstract "Iridium(III) complexes with a trifunctional pincer ligand containing protic N-heterocyclic carbene (pNHC), pyridine, and imine donor groups were obtained in two sequential steps: (i) protonation of 2-(1-(2,6-diisopropylphenylimino)ethyl)-6-(1-imidazolyl)pyridine (LCH; the superscript specifies the position of the tautomerizable H atom in the imidazole ring) with HBF4·Et2O to give the imidazolium salt [HLCH]+[BF4]− (protonation always occurs at the imidazole N atom) and (ii) metalation of the latter with [Ir(cod)(μ-Cl)]2 to give the hydrido pincer complex [Ir(H)(Cl)(NCMe){LNH-κ3Nimine,NPy,CNHC}]+[BF4]− (3+[BF4]−). Substitution of MeCN in 3+[BF4]− by treatment with triisopropylphosphine gave the analogue [Ir(H)(Cl)P(i-Pr)3{LNH-κ3Nimine,NPy,CNHC}]+[BF4]− (4+[BF4]−). Chloride abstraction from 3+[BF4]− by AgBF4 gave [Ir(H)(NCMe)2{LNH-κ3Nimine,NPy,CNHC}]2+[BF4–]2 (52+[BF4–]2). The centrosymmetric dinuclear Ir(III) complex [Ir(H)(NCMe){μ-(LCH−H)-κ3Nimine,NPy,C2,κN3}]22+[B(C6F5)3F–]2 (62+[B(C6F5)3F–]2) was obtained after deprotonation of 52+[BF4–]2 with KO-t-Bu, followed by addition of B(C6F5)3. It contains two Ir pincer moieties, each with a Nimine,NPy,C2 donor set, which are connected by the Ir–N bonds involving the imidazolide rings, leading to a μ-C,N bridging mode for the latter. Remarkably, all of the donor atoms in the tetradentate bridging chelating ligands are chemically different. The molecular structures of 3+[BF4]−·CH2Cl2, 4+[BF4]−·CH2Cl2, 52+[BF4–]2·2CH2Cl2, and 62+[B(C6F5)3F–]2·4CH2Cl2 have been determined by X-ray diffraction." @default.
• W2213220822 created "2016-06-24" @default.
• W2213220822 creator A5025525754 @default.
• W2213220822 creator A5063605867 @default.
• W2213220822 creator A5083771262 @default.
• W2213220822 date "2015-12-31" @default.
• W2213220822 modified "2023-09-25" @default.
• W2213220822 title "Trifunctional pNHC, Imine, Pyridine Pincer-Type Iridium(III) Complexes: Synthetic, Structural, and Reactivity Studies" @default.
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• W2213220822 doi "https://doi.org/10.1021/acs.organomet.5b00926" @default.
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