Synthesis and characterization of crotyl intermediates in Rh-catalyzed hydroformylation of 1,3-butadiene

• Verfasst von: Schmidt, Sebastian [VerfasserIn]
• Verfasst von: Baráth, Eszter [VerfasserIn]
• Verfasst von: Prommnitz, Tanja [VerfasserIn]
• Verfasst von: Rosendahl, Tobias [VerfasserIn]
• Verfasst von: Rominger, Frank [VerfasserIn]
• Verfasst von: Hofmann, Peter [VerfasserIn]
• Titel: Synthesis and characterization of crotyl intermediates in Rh-catalyzed hydroformylation of 1,3-butadiene
• Verf.angabe: Sebastian Schmidt, Eszter Baráth, Tanja Prommnitz, Tobias Rosendahl, Frank Rominger, and Peter Hofmann
• E-Jahr: 2014
• Jahr: October 2, 2014
• Umfang: 5 S.
• Fussnoten: Gesehen am 26.11.2020
• Titel Quelle: Enthalten in: Organometallics
• Ort Quelle: Washington, DC : ACS Publ., 1982
• Jahr Quelle: 2014
• Band/Heft Quelle: 33(2014), 21, Seite 6018-6022
• ISSN Quelle: 1520-6041
• DOI: doi:10.1021/om500643t
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1741195454

Abstract

Crotyl rhodium complexes like (κ2-L)Rh(η3-crotyl) and (κ2-L)Rh(η3-crotyl)(CO) (L = chelating phosphorus ligand) are important intermediates in hydroformylation catalysis of butadiene and related reactions. They are assumed to be responsible for the specific reactivity patterns of conjugated dienes. We prepared and characterized by X-ray crystallography several of these complexes with novel chelating bisphosphite ligands. (κ2-L)Rh(η3-crotyl) complexes exhibit a square-planar geometry, while their CO adducts (κ2-L)Rh(η3-crotyl)(CO) are trigonal-bipyramidal with the bisphosphite ligand in ee-bonding mode. Typically, the η3-crotyl unit can be oriented in several diastereomeric ways, of which oftentimes two or more are present in solution and in the solid state.