Impact of the Alkali Metal on the Structural and Dynamic Properties of the Anionic Pentahydride Ruthenium Complexes [M(THF) x ][RuH 5 (PCy 3 ) 2 ] (M = Li, Na, K) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Organometallics Année : 2021

Impact of the Alkali Metal on the Structural and Dynamic Properties of the Anionic Pentahydride Ruthenium Complexes [M(THF) x ][RuH 5 (PCy 3 ) 2 ] (M = Li, Na, K)

Résumé

A series of anionic ruthenium pentahydride complexes with the general formula [M(THF)x][RuH5(PCy3)2] (M = Li, Na, K) were synthesized. Their characterization by multinuclear NMR, IR, X-ray diffraction, and DFT techniques show that these complexes can adopt different structural features (monomer/dimer, cis/trans phosphines, hydride/dihydrogen ligands) depending on the countercation, the solvent, and/or the temperature. While the X-ray diffraction analyses offer snapshots of three out of five isomeric structures found by DFT, the solution and solid-state NMR analysis proved that these complexes exhibit a highly dynamic behavior. Rapid H–D exchange was found between Ru–H and D2, which was attributed to the presence of Ru–H·····M interactions in the absence of crown-ether.
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hal-03357901 , version 1 (29-09-2021)

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Ramaraj Ayyappan, Koushik Saha, Mary Grellier, Eric Clot, Laure Vendier, et al.. Impact of the Alkali Metal on the Structural and Dynamic Properties of the Anionic Pentahydride Ruthenium Complexes [M(THF) x ][RuH 5 (PCy 3 ) 2 ] (M = Li, Na, K). Organometallics, 2021, 40 (17), pp.3024-3032. ⟨10.1021/acs.organomet.1c00384⟩. ⟨hal-03357901⟩
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