52615-19-7

Upstream product

• 15226-74-1 dicobalt octacarbonyl 
• 2071-20-7 bis-diphenylphosphinomethane 

Downstream Products

• 81533-57-5 Co₄(CO)8(CH₂(P(C₆H₅)2)2)2 

Relevant academic research and scientific papers

Amination and Suzuki coupling reactions catalyzed by palladium complexes coordinated by cobalt-containing monodentate phosphine ligands with bis-trifluoromethyl substituents on bridged arylethynyl: Observation of some unusual metal-containing compounds

Two cobalt-containing bulky monodentate phosphines {[(μ-PPh2CH2PPh2)Co2(CO)4][(μ,η-(tBu)2PC{triple bond, long}CAr]} (4cm: Ar = 3-CF3C6H4; 4cmm: A

Design, synthesis, application, and DFT investigation of Suzuki-Miyaura reactions of a dicobalt carbonyl-containing phosphine ligand

The preparation and characterization of a novel dicobalt-containing monophosphine ligand, 4a, is presented. Palladium-catalyzed Suzuki-Miyuara reactions employing 4a/Pd(OAc)2 were pursued. The optimized reaction conditions were found to start w

Synthesis and reactivity of cobalt dimers of the type Co2(CO)3(L-L)2I2. Crystal structure of [Co2(CO)2(μ-CO) (μ-I) (Me2PCH2PMe2) (Ph2PCH2PPh2)]I

The cobalt dimers Co2(CO)3(L-L)2, L-L = Ph2PCH2PPh2 (dppm) and Me2PCH2PMe2 (dmpm), are oxidized by iodine in the presence of bis(diphenylphosphino)methane to yield the ionic complexes [Co2(CO)3(L-L)(L-L)′]I. In a similar fashion, Co2(CO)6(dppm) reacts with elemental sulfur to yield Co2(CO)3(dppm)2S. The complex [Co2(CO)3(dmpm)(dppm)I]I crystallizes in the P21/n space group with dimensions a = 10.956 (3) A, b = 15.881 (6) ?, c = 21.393 (5) ?, and β = 97.20 (2)° with four molecules per unit cell. Of a total of 4796 unique reflections collected, 2965 reflections with Fo2 > 3σ(Fo2) were used to refine the structure. The structure converged at R = 0.051 and Rw = 0.065. The geometry around the cobalt atoms is very similar to that reported for [Rh2(CO)3(dppm)2Cl]+, [Rh2(CO)3(dppm)2H]+, and Ir2(CO)3(dppm)2S. The molecule may be described as an A-frame structure with a neutral ligand, CO, occupying the additional bridging site. The observed Co-Co bond distance is 2.555 (2) ? consistent with a single bond between the metal atoms. Reduction of the ionic complex with zinc yields a pyrophoric green solid that analyzes approximately for Co2(CO)3(dppm)2.

Solution structure and dynamics of Co2(CO)6(L L) and Co4(CO)8(L L)2 molecules

The solution structure and dynamics of the molecules Co4(CO)8(L L)2, where L L = bis(diphenylphosphino)methane, bis(dimethylphosphino)methane, and (dimethylphosphino)(diphenylphosphino)methane, have been determined by 13C and 31P NMR spectroscopy. The structure is derived from the C3v, structure of Co4(CO)12 with four CO's replaced by the two di(tertiary phosphines). All eight carbonyls exchange at the same rate, indicating a concerted mechanism for the exchange process. The corresponding dimers, Co2(CO)6L L, are also fluxional in solution, and for these molecules the slow-exchange limit could not be reached. The tetramers are synthesized directly, in high yield, by pyrolysis of the dimers.

Reactions of the linked cobalt dimer Co2(CO)6(Ph2PCH2PPh2). Molecular structure of (μ-H)(μ-PPh2)Co2(CO)4(Ph 2PCH2PPh2)

The dimer Co2(CO)6(DPM) (1) (DPM = bis(diphenylphosphino)methane) reacts with hydrogen at moderate pressures (75 atm) to cleave the DPM ligand and yield (μ-H)(μ-PPh2)Co2(CO)4(DPM) (2). This compound can also be synthesized directly from 1 and PPh2H. Pyrolysis of 1 yields the tetranuclear cluster Co4(CO)8(DPM)2. Oxidation of 1 yields the ionic compound [Co2(CO)3(DPM)2I]I. Compound 2 crystallizes in the space group P1, with a = 10.627 (1) A?, b = 19.196 (2) A?, c = 10.251 (1) A?, α = 95.430 (8)°, β = 91.491 (10)°, γ = 85.032 (9)°, and V = 2072.8 A?3. The structure was refined by using 4824 reflections having Fo2 > 10σ(Fo2). The final residuals were R = 0.056 and Rw = 0.096. The cobalt atoms are bridged by a hydride ligand, a phosphido group, and a bis(tertiary phosphine); as a result the Co-Co bond is very long, 2.637 (1) A?. The hydride was found to bridge the two cobalt atoms, with Co-H distances of 1.41 (7) and 1.84 (7) A?. The influence of the μ-H and μ-PPh2 groups is to bend two terminal carbonyls away from the cobalt-cobalt bond. The NMR spectrum shows the hydride as a doublet of triplets at -8.60 ppm.