Direkt zum Inhalt
Merck
  • Twisted paddlewheel rhodium complexes: Contribution of central and axial chirality to ECD, VCD, and NMR spectra.

Twisted paddlewheel rhodium complexes: Contribution of central and axial chirality to ECD, VCD, and NMR spectra.

Chirality (2020-02-08)
Márk Szabó, Márk Kleineisel, Krisztina Németh, Attila Domján, Elemér Vass, Gábor Szilvágyi
ZUSAMMENFASSUNG

Dirhodium complexes bearing N-substituted chiral amino acid ligands are investigated. These complexes have an unusual twisted paddlewheel structure, showing inherent chirality. We would like to demonstrate that parallel application of chiroptical spectroscopic methods (ECD and VCD) and NMR spectroscopy combined with quantum chemical calculations constitutes a powerful tool to determine the configuration of the complexes unequivocally. Two chiroptical methods are needed to determine the absolute configuration: ECD for the coordinated nitrogen atom and VCD for the rhodium core. A quick to use NMR method is also presented: Upon the coordination of small molecules in the axial position, the relative configuration of both the rhodium core and the nitrogen atom can be determined simultaneously by studying spatial proximities provided by 1D NOE spectra.

MATERIALIEN
Produktnummer
Marke
Produktbeschreibung

Sigma-Aldrich
Pyridin, anhydrous, 99.8%
Sigma-Aldrich
Acetonitril-d3, "100%", 99.96 atom % D