Search results
Results from the WOW.Com Content Network
Tetrakis(triphenylphosphine)palladium(0) (sometimes called quatrotriphenylphosphine palladium) is the chemical compound [Pd(P(C 6 H 5) 3) 4], often abbreviated Pd(PPh 3) 4, or rarely PdP 4. It is a bright yellow crystalline solid that becomes brown upon decomposition in air .
Tetrakis(triphenylphosphine)platinum(0) is the chemical compound with the formula Pt(P(C 6 H 5) 3) 4, often abbreviated Pt(PPh 3) 4. The bright yellow compound is used as a precursor to other platinum complexes. [2] [3]
Triphenylphosphine (IUPAC name: triphenylphosphane) is a common organophosphorus compound with the formula P(C 6 H 5) 3 and often abbreviated to P Ph 3 or Ph 3 P. It is versatile compound that is widely used as a reagent in organic synthesis and as a ligand for transition metal complexes, including ones that serve as catalysts in organometallic chemistry.
An organic compound adds across Pd 0 to form an organic Pd 2+ complex (oxidative addition). After transmetalation with an organometallic compound, two organic ligands to Pd 2+ may exit the palladium complex and combine, forming a coupling product and regenerating Pd 0 (reductive elimination). [2] For the Suzuki reaction, commonly used catalysts ...
Triphenylphosphine oxide (often abbreviated TPPO) is the organophosphorus compound with the formula OP(C 6 H 5) 3, also written as Ph 3 PO or PPh 3 O (Ph = C 6 H 5). It is one of the more common phosphine oxides. This colourless crystalline compound is a common but potentially useful waste product in reactions involving triphenylphosphine.
Wilkinson's catalyst (chloridotris(triphenylphosphine)rhodium(I)) is a coordination complex of rhodium with the formula [RhCl(PPh 3)], where 'Ph' denotes a phenyl group. It is a red-brown colored solid that is soluble in hydrocarbon solvents such as benzene, and more so in tetrahydrofuran or chlorinated solvents such as dichloromethane .
[1] [2] A variety of nickel catalysts in either Ni 0 or Ni II oxidation state can be employed in Negishi cross couplings such as Ni(PPh 3) 4, Ni(acac) 2, Ni(COD) 2 etc. [3] [4] [5] The leaving group X is usually chloride, bromide, or iodide, but triflate and acetyloxy groups are feasible as well. X = Cl usually leads to slow reactions.
In chemistry, compounds of palladium(III) feature the noble metal palladium in the unusual +3 oxidation state (in most of its compounds, palladium has the oxidation state II). Compounds of Pd(III) occur in mononuclear and dinuclear forms. Palladium(III) is most often invoked, not observed in mechanistic organometallic chemistry. [1] [2]