Polyethylene-bound rhodium(I) hydrogenation catalysts

Journal Article · Wed Jan 07 04:00:00 EST 1987 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00235a027· OSTI ID:6812647

Bergbreiter, D E; Chandran, R

Homogeneous, recoverable hydrogenation catalysts were prepared with use of functionalized ethylene oligomers as ligands. Phosphine groups were introduced onto ethylene oligomers following anionic oligomerization of ethylene. The product polyethylenediphenylphosphine ligands were then exchanged with triphenylphosphine or ethylene ligands to prepare ethylene oligomer ligated rhodium(I) complexes. These Rh(I) complexes had the solubility of polyethylene and dissolved at 90-110/sup 0/C in hydrocarbon solvents but quantitatively precipitated at 25/sup 0/C. Less than 0.1% of the charged rhodium was lost in each dissolution precipitation cycle. The rhodium(I) complexes so prepared were shown to have about 80% of the activity of tris(triphenylphosphine)rhodium chloride in hydrogenation of various alkenes including 1-octene, ..delta../sup 2/-cholestene, cyclooctene, cyclododecene, styrene, and ..cap alpha..-methylstyrene. /sup 31/P NMR spectroscopy and reactivity studies were used to characterize these catalysts.

• Research Organization: Texas A and M Univ., College Station
• OSTI ID: 6812647
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 109:1; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKENES
CATALYSTS
CHEMICAL PREPARATION
CHEMICAL PROPERTIES
CHEMICAL REACTIONS
COMPLEXES
DATA
ETHYLENE
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGENATION
INFORMATION
ISOTOPES
LIGANDS
LIGHT NUCLEI
MAGNETIC RESONANCE
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
PHOSPHINES
PHOSPHORUS 31
PHOSPHORUS COMPOUNDS
PHOSPHORUS ISOTOPES
RESONANCE
RHODIUM COMPLEXES
SOLUBILITY
SPECTRA
STABLE ISOTOPES
SYNTHESIS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPLEXES