Ruthenium macrocycles bearing pyridine bis(carboxamide): synthesis, structure, and catalytic activity for hydrosilylation

Ruthenium complexes Ru( MC33 )(CO) n (L) 2− n (L = H 2 O, PPh 3 , P(OEt) 3 ; n = 1, 2) with a pincer-type macrocyclic ligand MC33 with a cavity were synthesized and characterized. Ru( MC33 )(CO) 2 (H 2 O) was obtained in yields of up to 97% using a pincer-type ligand containing the bis(carboxamide)...

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Bibliographic Details
Published in:New journal of chemistry 2021-10, Vol.45 (39), p.18282-18289
Main Authors: Sato, Hiroki, Tsukamoto, Tadashi, Sogawa, Hiromitsu, Kuwata, Shigeki, Takata, Toshikazu
Format: Article
Language:English
Subjects:
Carbon monoxide
Carbonyls
Catalytic activity
Chemical synthesis
Hydrosilylation
Infrared analysis
Infrared spectroscopy
Ligands
NMR spectroscopy
Phosphines
Ruthenium compounds
Spectrum analysis
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Summary:Ruthenium complexes Ru( MC33 )(CO) n (L) 2− n (L = H 2 O, PPh 3 , P(OEt) 3 ; n = 1, 2) with a pincer-type macrocyclic ligand MC33 with a cavity were synthesized and characterized. Ru( MC33 )(CO) 2 (H 2 O) was obtained in yields of up to 97% using a pincer-type ligand containing the bis(carboxamide) moiety and ruthenium(0) carbonyl precursor. Ru( AC )(CO) 2 (H 2 O) having a pincer-type acyclic ligand AC was also synthesized in a similar manner to Ru( MC33 )(CO) 2 (H 2 O). Mono(phosphine) and bis(phosphite) complexes were formed via the selective thermal ligand exchange of CO with phosphorus ligands. The structure of the complexes was studied by nuclear magnetic resonance spectroscopy, infrared spectroscopy, electrospray ionization-high-resolution mass spectroscopy, and X-ray analyses. In addition, their catalytic activity for hydrosilylation was demonstrated. Ruthenium complexes Ru( MC33 )(CO) n (L) 2− n (L = H 2 O, PPh 3 , P(OEt) 3 ; n = 1, 2) with a pincer-type macrocyclic ligand MC33 with a cavity were synthesized and characterized.
ISSN:1144-0546
1369-9261
DOI:10.1039/d0nj06133f