Structure-dependent regioselectivity of a roll-over cyclopalladation occuring at 2,2′-bipyridine-type ligands
In this work, different bipyridine-analogue ligands bearing a dimethylamino group in the meta-position of one of the heterocyclic rings were synthesized and reacted with palladium(II) acetate under identical conditions. Cyclometallated palladium(II) complexes with C,N- or C,N,N’-coordinating chelate...
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| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
12 March 2021
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| In: |
Journal of organometallic chemistry
Year: 2021, Jahrgang: 940, Pages: 1-7 |
| ISSN: | 1872-8561 |
| DOI: | 10.1016/j.jorganchem.2021.121780 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1016/j.jorganchem.2021.121780 Verlag, Volltext: https://www.sciencedirect.com/science/article/pii/S0022328X21001017 
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| Verfasserangaben: | Yanik Becker, Florian Schön, Sabine Becker, Yu Sun, Werner R. Thiel |
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| 245 | 1 | 0 | |a Structure-dependent regioselectivity of a roll-over cyclopalladation occuring at 2,2′-bipyridine-type ligands |c Yanik Becker, Florian Schön, Sabine Becker, Yu Sun, Werner R. Thiel |
| 246 | 3 | 3 | |a Structure-dependent regioselectivity of a roll-over cyclopalladation occuring at two comma two′-bipyridine-type ligands |
| 246 | 3 | 3 | |a Structure-dependent regioselectivity of a roll-over cyclopalladation occuring at two,two′-bipyridine-type ligands |
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| 520 | |a In this work, different bipyridine-analogue ligands bearing a dimethylamino group in the meta-position of one of the heterocyclic rings were synthesized and reacted with palladium(II) acetate under identical conditions. Cyclometallated palladium(II) complexes with C,N- or C,N,N’-coordinating chelate ligands are formed which were characterized by elemental analysis, 1H and 13C NMR spectroscopy, and single crystal X-ray diffraction analysis. In the case of the mononuclear, C,N,N’-coordinated complex, which is formed by an attack of the palladium(II) site at of the N-methyl groups, the primarily coordinating acetato ligand is exchanged against a chlorido ligand, which is liberated from the solvent dichloromethane by a nucleophilic substitution reaction. In contrast, cyclometallation occurring at one of the six-membered heterocycles leads to dinuclear acetato-bridged palladium(II) complexes. | ||
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| 650 | 4 | |a NMR spectroscopy | |
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| 650 | 4 | |a Roll-over cyclometallation | |
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| 700 | 1 | |a Thiel, Werner R. |e VerfasserIn |4 aut | |
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