Trifunctional pNHC, Imine, Pyridine Pincer-Type Iridium(III) Complexes: Synthetic, Structural, and Reactivity Studies
| Autor: | Pierre Braunstein, Andreas A. Danopoulos, Fan He |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
010405 organic chemistry
Organic Chemistry Inorganic chemistry Imine Protonation 010402 general chemistry 01 natural sciences Triisopropylphosphine Medicinal chemistry 0104 chemical sciences Pincer movement Inorganic Chemistry chemistry.chemical_compound chemistry Pyridine Imidazole Physical and Theoretical Chemistry Pincer ligand Carbene |
| Zdroj: | Organometallics. 35:198-206 |
| ISSN: | 1520-6041 0276-7333 |
| DOI: | 10.1021/acs.organomet.5b00926 |
| Popis: | 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 obtain... |
| Databáze: | OpenAIRE |
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