title: Interception and characterization of alkyl and acyl complexes in rhodium-catalyzed hydroformylation of styrene.
abstract: Reaction of [Rh(H)(CO)2(BDP)] (BDP = bis(diazaphospholane)) with styrene at low temperatures enables detailed NMR characterization of four- and five-coordinate rhodium alkyl complexes [Rh(styrenyl)(CO)n(BDP)] presumed to be intermediates in rhodium-catalyzed hydroformylation. The five-coordinate acyl complexes [Rh(C(O)styrenyl)(CO)2(BDP)] are also observed and characterized. The equilibrium distribution of these species suggests an inversion of thermodynamic preference for branched vs linear species from the alkyl to the acyl stage.
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, USA.
authors.forename: Eleanor R
authors.initials: ER
authors.lastname: Nelsen
authors.forename: Clark R
authors.initials: CR
authors.lastname: Landis
mesh_terms: D000447:Aldehydes / Q000138:chemical synthesis* / Q000737:chemistry; D002384:Catalysis; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D012238:Rhodium / Q000737:chemistry*; D020058:Styrene / Q000737:chemistry*; D013816:Thermodynamics
chemical_list: D000447:Aldehydes; D009942:Organometallic Compounds; D020058:Styrene; D012238:Rhodium