15906-55-5

Upstream product

• 201230-82-2 carbon monoxide 
• 15226-74-1 dicobalt octacarbonyl 
• 603-35-0 triphenylphosphine 
• 14243-08-4 tricarbonyldi(triphenylphosphine)cobalt⁽¹⁺⁾ tetracarbonylcobaltate^(1-) 
• 15226-74-1 dicobalt octacarbonyl 

Downstream Products

• 14243-08-4 tricarbonyldi(triphenylphosphine)cobalt⁽¹⁺⁾ tetracarbonylcobaltate^(1-) 
• 1621603-49-3 Co₂(CO)₅(PPh₃)(R)-BINAP 
• 15747-05-4 trans-Cl₂Sn(Co(CO)3PPh₃)2 

Relevant academic research and scientific papers

Preparation of triphenylphosphane substituted ethoxycarbonylcarbene-bridged dicobalt carbonyl complexes and their application as catalyst precursors in the carbonylation of ethyl diazoacetate to diethyl malonate

The triphenylphosphane substituted derivatives Co2(CO) 6(CHCO2Et)(PPh3), [μ 2-{ethoxycarbonyl(methylene)}-μ 2-(carbonyl)-(tricarbonyl-cobalt) -(triphenylphosphane-dicarbonyl-cobalt) (CoCo)]

Cobalt-catalyzed hydrogenation of β-enamino esters using an internal mixture of bidentate and monodentate ligands

Different β-amino esters have been obtained in good yields by means of octacarbonyldicobalt-catalyzed hydrogenation of β-enamine esters in the presence of mixture of a bidentate phosphine chiral (R-BINAP) and a monodentate phosphine achiral (PPh3/su

Triphenylphosphane-modified cobalt catalysts for the selective carbonylation of ethyl diazoacetate

The triphenylphosphane-substituted carbonyl cobalt complexes Co 2(CO)7(PPh3), Co2(CO) 6(CHCO2Et)(PPh3), and [Co(CO) 3(PPh3)2][Co(CO)4] were found to be more effective precatalysts in the carbonylation of ethyl diazoacetate under atmospheric pressure of carbon monoxide at 10 °C in dichloromethane solution than the parent Co2(CO)8 and Co2(CO) 7(CHCO2Et) complexes. The highly reactive (ethoxycarbonyl)ketene is the primary product of the catalytic carbonylation, which dimerizes in the absence of a proper scavenger. In the presence of ethanol as the trapping reagent diethyl malonate is the final product of the carbonylation reaction. The formation of (ethoxycarbonyl)ketene using the catalyst precursor Co2(CO)7(PPh3) occurs in a catalytic cycle, where Co2(CO)6(PPh3) and Co2(CO)6(CHCO2Et)(PPh3) are the repeating species. The 16e species Co2(CO)6(PPh 3) is involved in the deazotization of ethyl diazoacetate, and Co2(CO)6(CHCO2Et)(PPh3) leads to the (ethoxycarbonyl)ketene formation. In the absence of carbon monoxide or at low CO concentration the reaction of Co2(CO)6(CHCO 2Et)(PPh3) with ethyl diazoacetate is the source of Co2(CO)5(CHCO2Et)2(PPh3), which is not an active catalyst for the carbonylation of ethyl diazoacetate. Using [Co(CO)3(PPh3)2][Co(CO)4] as the catalyst precursor, the intermediary formation of [Co(CO) 3(PPh3)2][Co(CO)3(O=C=CHCO 2Et)] through radical pairs is assumed. Substituting PPh3 in Co2(CO)7(PPh3), Co2(CO) 6(CHCO2Et)(PPh3), and [Co(CO) 3(PPh3)2][Co(CO)4] by polymer-bound PPh3 results in active and reusable catalysts for the selective carbonylation of ethyl diazoacetate in dichloromethane solution at 40 °C and 11 bar of pressure with up to 5.1 mol of product/((mol of catalyst) h) turnover frequency.

Kinetic studies on the cobalt-catalyzed norbornadiene intermolecular Pauson-Khand reaction

The kinetics for the cobalt-catalyzed intermolecular Pauson-Khand reaction (PKR) between (trimethylsilyl)acetylene and norbornadiene (NBD) at a constant CO pressure has been studied by means of in situ FT-IR. The rate dependence on catalyst and substrate concentrations was examined, and it was found that the process is -1.9 order with respect to CO pressure, zero order with respect to acetylene, 0.3-1.2 order with respect to NBD, and 1.3 order with respect to the Co2(CO)8 catalyst. Catalytic reaction intermediates were examined by their corresponding metal carbonyl IR frequencies. By a one-pot consecutive Pauson-Khand experiment, the NBD-dicobalt hexacarbonyl complex was identified as a catalytically active complex. Co4(CO)12 was also studied as a catalyst source in the PKR. Analysis of the corresponding reaction intermediates by IR demonstrated that Co2(CO)8 and Co4(CO)12 provide identical intermediate profiles upon reaction with TMSC2H. The experimental measured kinetics are consistent with the alkene insertion being the rate-limiting step in the catalytic PKR. Finally, the effect of phosphine substitution on the catalyst and the use of Lewis acid additives were shown to have a deleterious effect on the reaction rate.

The application of polymer-bound carbonylcobalt(0) species in linker chemistry and catalysis

Carbonylcobalt(0) species have been used as linkers between alkynes and a polymer support for the first time. The alkynes may be loaded indirectly onto a phosphine functionalised polymer via their hexacarbonyldicobalt(0) complex, or directly onto a cobalt