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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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Bibliographische Detailangaben
Hauptverfasser: Becker, Yanik (VerfasserIn) , Schön, Florian (VerfasserIn) , Becker, Sabine (VerfasserIn) , Sun, Yu (VerfasserIn) , Thiel, Werner R. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 12 March 2021
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
Volltext
Verfasserangaben:Yanik Becker, Florian Schön, Sabine Becker, Yu Sun, Werner R. Thiel
Beschreibung
Zusammenfassung: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.
Beschreibung:Gesehen am 21.06.2021
Beschreibung:Online Resource
ISSN:1872-8561
DOI:10.1016/j.jorganchem.2021.121780

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