Novel synthesis of modified tetraphosphine ligands for bimetallic hydroformylation catalysis
- Louisiana State Univ., Baton Rouge, LA (United States)
Bimetallic rhodium complexes based on the novel binucleating tatraphosphine ligand system racemic-Et{sub 2}PCH{sub 2}CH{sub 2}P(Ph)CH{sub 2}P(Ph)CH{sub 2}CH{sub 2}PEt{sub 2}, et,ph-P4, are highly active and selective hydroformylation catalysts that make use of bimetallic cooperativity to operate. The versatility of the previously reported hydroformylation ligand (et,ph-P4) has been expanded by changing the substituents on the internal phosphorus atoms. This was made possible by the ability to synthesize a variety of substituted methylene bridges of the type (H)RPCH{sub 2}PR(H). These were made by employing a new Grignard-like synthesis with bis(dichlorophosphine)methane (Cl{sub 2}PCH{sub 2}PCl{sub 2}). This new Grignard-like chemistry has also allowed us to synthesize, cleanly and quantitatively, previously unattainable disubstituted alkyl phosphines of the type P(H)R{sub 2} and P(Cl)R{sub 2}.
- OSTI ID:
- 370618
- Report Number(s):
- CONF-960376-; TRN: 96:003805-0675
- Resource Relation:
- Conference: Spring national meeting of the American Chemical Society (ACS), New Orleans, LA (United States), 24-28 Mar 1996; Other Information: PBD: 1996; Related Information: Is Part Of 211th ACS national meeting; PB: 2284 p.
- Country of Publication:
- United States
- Language:
- English
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