Introducing the Perfluorinated Cp* Ligand into Coordination Chemistry.

Angew Chem Int Ed Engl

Freie Universität Berlin, Institut für Chemie und Biochemie, Anorganische Chemie, Fabeckstraße 34-36, 14195, Berlin, Germany.

Published: October 2022

The reaction of AgBF and [Rh(COD)Cl] (COD=1,5-cyclooctadiene) in presence of [NEt ][C (CF ) ] afforded the fluorocarbon soluble complex [Rh(COD)(C (CF ) )] by salt metathesis. This complex represents the first example for a successful coordination of the weakly basic [C (CF ) ] ligand, since its first synthesis in 1980. In addition to [Rh(COD)(C (CF ) )] also the byproduct [Rh(COD)(C (CF ) H)] was isolated and fully characterized. Accompanying DFT studies showed that the interaction energy of the [C (CF ) ] ligand towards the 12-electron fragment [Rh(COD)] is ≈70 kcal mol lower in comparison to [C (CH ) ] due to reduced electrostatic interactions and weaker π-donor properties of the ligand. The quantitative but reversible substitution of the [C (CF ) ] ligand by toluene, converting it into a weakly coordinating anion, experimentally proved the extraordinary weak bonding interaction.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9826324PMC
http://dx.doi.org/10.1002/anie.202211147DOI Listing

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