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Triple Resonance Experiments for the Rapid Detection of 103Rh NMR Shifts: A Combined Experimental and Theoretical Study into Dirhodium and Bismuth-Rhodium Paddlewheel Complexes.


ABSTRACT: A H(C)Rh triple resonance NMR experiment makes the rapid detection of 103Rh chemical shifts possible, which were previously beyond reach. It served to analyze a series of dirhodium and bismuth-rhodium paddlewheel complexes of the utmost importance for metal-carbene chemistry. The excellent match between the experimental and computed 103Rh shifts in combination with a detailed analysis of the pertinent shielding tensors forms a sound basis for a qualitative and quantitative interpretation of these otherwise (basically) inaccessible data. The observed trends clearly reflect the influence exerted by the equatorial ligands (carboxylate versus carboxamidate), the axial ligands (solvents), and the internal "metalloligand" (Rh versus Bi) on the electronic estate of the reactive Rh(II) center.

SUBMITTER: Calo FP 

PROVIDER: S-EPMC8377716 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature

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Triple Resonance Experiments for the Rapid Detection of <sup>103</sup>Rh NMR Shifts: A Combined Experimental and Theoretical Study into Dirhodium and Bismuth-Rhodium Paddlewheel Complexes.

Caló Fabio P FP   Bistoni Giovanni G   Auer Alexander A AA   Leutzsch Markus M   Fürstner Alois A  

Journal of the American Chemical Society 20210805 32


A H(C)Rh triple resonance NMR experiment makes the rapid detection of <sup>103</sup>Rh chemical shifts possible, which were previously beyond reach. It served to analyze a series of dirhodium and bismuth-rhodium paddlewheel complexes of the utmost importance for metal-carbene chemistry. The excellent match between the experimental and computed <sup>103</sup>Rh shifts in combination with a detailed analysis of the pertinent shielding tensors forms a sound basis for a qualitative and quantitative  ...[more]

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