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Usage

Uses

Used in Chemical Synthesis:
[Rh COD (PPh3)2]BF4, Rh 12.5% is used as a catalyst for hydrogenation reactions, which are crucial in the production of various chemicals and pharmaceuticals. The application reason is its ability to facilitate the addition of hydrogen (H2) to unsaturated organic compounds, leading to the formation of saturated products.
Used in Petrochemical Industry:
In the petrochemical industry, [Rh COD (PPh3)2]BF4, Rh 12.5% is used as a catalyst for hydroformylation, a process that involves the conversion of alkenes to aldehydes. The application reason is its efficiency in producing aldehydes, which are essential intermediates in the synthesis of various chemicals, plastics, and detergents.
Used in Enantioselective Synthesis:
[Rh COD (PPh3)2]BF4, Rh 12.5% is used as a catalyst in enantioselective synthesis, which is important for the production of chiral compounds with specific configurations. The application reason is its ability to selectively catalyze reactions to produce one enantiomer over the other, which is crucial in the pharmaceutical industry for the development of drugs with desired biological activities.
Used in Laboratory Research:
In academic and research settings, [Rh COD (PPh3)2]BF4, Rh 12.5% is used as a catalyst for various organic reactions, including carbonylation, hydrosilation, and C-C bond formation. The application reason is its versatility and ability to promote a wide range of reactions, making it a valuable tool for the development of new synthetic methods and the study of reaction mechanisms.

Upstream product

• 83710-15-0 dihydridobis(acetone)bis(triphenylphosphine)rhodium(III) tetrafluoroborate 
• 5259-72-3 cyclo-octa-1,5-diene 
• 35138-22-8 bis(1,5-cyclooctadiene)rhodium(I) tetrafluoroborate 
• 603-35-0 triphenylphosphine 
• 808760-35-2 [(κ2-N,S-1-PS(iPr)2-2-NMe2-indenyl)(η4-(1,5-cyclooctadiene)rhodium(I)]BF4 

Downstream Products

• 129176-22-3 {Rh(η4-Me2C4H2SiMe2)(PPh3)2}(BF4) 
• 129176-24-5 {Rh(η4-Me2C4H2SiMePh)(PPh3)2}(BF4) 

Relevant academic research and scientific papers

High-pressure effects in the homogeneously catalyzed hydroformylation of olefins

The homogeneously catalyzed hydroformylation of linear olefins (octenes and butanes) was studied at 7-550 MPa. At high-pressures, the yields of aldehydes generally increased. Lower l/b ratios at higher pressures resulted from the formation of an unmodified rhodium catalyst. Isomerization of the olefin prior to hydroformylation was completely suppressed in the conversion of 1-octene at high-pressures, while the isomerization of 4-octene led to a mixture of all possible aldehydes. Isomerization of 4-octene was less hindered at high-pressures than was the isomerization of 1-octene. The pressure effect on the isomerization rates was a kinetic effect. Yields of hydroformylation of sterically hindered, substituted butenes increased at high-pressures.

Catalytic hydroformylation in the presence of rhodium complexes with homo- and heterocombination of two monodentate P-ligands

Activity of the complex containing both a phosphine and an amidophosphite ligand in the coordination sphere of rhodium was determined for the first time in the hydroformylation of styrene and oct-1-ene in supercritical carbon dioxide and benzene. The efficiency of this mixed heteroligand complex was compared with that of its analogs each containing the same two phosphine or two amidophosphite ligands.

Rh(I) and Ir(I) derivatives of a P(S),N-substituted indene ligand: Synthetic, structural, and catalytic alkene hydrosilylation studies

Treatment of 1-PiPr2-indene or 1-PiPr 2-2-NMe2-indene (1a) with elemental sulfur afforded 3-iPr2P(S)-indene or 1-iPr2P(S)-2- NMe2-indene (4a) in 81% and 85% isolated yield, respectively. Addition of 4a to [(COD)M(THF)2]+BF4 - afforded the corresponding [(COD)M(κ2-N,S-4a)] +BF4- complexes (M = Rh, 5a, 76%; M = Ir, 5b, 59%; COD = η4-1,5-cyclooctadiene), which were found to exhibit temperature-dependent NMR spectral features that were rationalized in terms of a dynamic process involving M-NMe2 dissociation, rotation about the indenyl-NMe2 bond, inversion at nitrogen, and re-coordination to M. Analysis of variable-temperature NMR data collected for 5a and 5b each yielded a value for ΔG? of ca. 14 kcal/mol for this process. Exposure of 5a or 5b to NaN(SiMe3)2 generated the corresponding (COD)M(κ2-C,S-1-iPr 2P(S)-2-NMe2-(C1-indenyl)) complex (M = Rh, 6a, 70%; M = Ir, 6b, 86%) in which the metal is incorporated into an M-C-P-S ring via coordination to the indenyl ring in an η1-fashion, as well as to sulfur. Alternatively, complex 6b was prepared cleanly via lithiation of 4a followed by treatment with 0.5 equiv of [(COD)IrCl]2. The ability of 5a,b and 6a,b to mediate the addition of triethylsilane to styrene was also explored, and their performance was compared with that of Wilkinson's Catalyst ((PPh3)3RhCl) and Crabtree's catalyst ([(COD)Ir(PCy 3)(Py)]+PF6-; Cy = cyclohexyl; Py = pyridine). Single-crystal X-ray diffraction data are provided for 4a, 2-NMe 2-3-iPr2P(S)-indene (4b), 6a, and 6b.

PROCESS FOR PREPARING CATIONIC RHODIUM COMPLEXES

A process is described for the synthesis of a cationic [rhodium diolefin phosphorus ligand] complex comprising the steps of: (a) reacting a rhodium-diolefin-1,3-diketonate and an acid in a ketone solvent, (b) adding a stabilising olefin to form a stabilised cationic rhodium compound, and (c) mixing a phosphorus ligand with the solution of the stabilised cationic rhodium compound to form a solution of the cationic [rhodium diolefin phosphorus ligand] complex. The solution may be used directly or the complex recovered. In one embodiment, the solution may be combined with a co-solvent and the ketone removed to give a new catalyst solution, from which the complex may be recovered.

Dihydrido Olefin and Solvento Complexes of Iridium and the Mechanisms of Olefin Hydrogenation and Alkane Dehydrogenation

Tests for homogeneity are applied to the catalysts L2>A/CH2Cl2/H2 (cod-1,5-cyclooctadiene; A = BF4; L=PPh3, PMePh2) and their possible generality is discussed. L2>A (L=PPh3) reacts with H2 and S (S=solvent) to give the isolable complexes IrH2S2L2>A (1) in which the displacement order of the M-S groups is H2O ca.THF2L2>A (ol = C2H4, C3H8) and L2>A (ol = PhCH=CH2, C5H8, t-BuCH=CH2).Their role in hydrogenation is discussed in the light of stepwise catalytic 1H NMR studies at -80 to +25 deg C, in which they appear to be intermediates in catalysis.A catalytic cycle is proposed.Selectivity in competitive experiments is discussed.The rhodium analogues do no exhibit similar properties.