Functionalized cyclopentadienyl rhodium(iii) bipyridine complexes: synthesis, characterization, and catalytic application in hydrogenation of ketonesElectronic supplementary information (ESI) available: HHCOSY, NOESY, HMBC spectra, cyclic voltammograms. CCDC 921223 (6e). For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c3dt50445j

• Main Authors: Wang, Wan-Hui, Suna, Yuki, Himeda, Yuichiro, Muckerman, James T, Fujita, Etsuko
• Format: Journal Article
• Language: English
• Published: 12.06.2013
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/c3dt50445j

A series of highly functionalized cyclopentadienyl rhodium( iii ) complexes, [CpRh(bpy)Br](ClO 4 ) (Cp = substituted cyclopentadienyl), was synthesized from various multi-substituted cyclopentadienes (CpH). [Rh(cod)Cl] 2 and CpH were firstly converted to [CpRh(cod)] complexes, which were then treated with Br 2 to give the rhodium( iii ) dibromides [CpRhBr 2 ] 2 . The novel complexes [CpRh(bpy)Br](ClO 4 ) were obtained readily by the reaction of 2,2-bipyridine with [CpRhBr 2 ] 2 . These rhodium complexes [CpRh(bpy)Br](ClO 4 ) were fully characterized and utilized in the hydrogenation of cyclohexanone and acetophenone with generally high yields, but they did not exhibit the same reactivity trends for the two substrate ketones. The different activity of these complexes for the different substrates may be due to the influence of the substituents on the Cp rings. A series of highly functionalized [CpRh(bpy)Br] + has been synthesized, fully characterized, and utilized in the hydrogenation of ketones.