tetrakis(triphenylphosphine)palladium
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- 14221-01-3, palladium, triphenylphosphine
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| Product name | tetrakis(triphenylphosphine)palladium | Certification | - |
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| Category | Catalyst & Chemical Auxiliaries | Ingredients | - |
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Product Information
CAS No.:14221-01-3, Other Names:Pd(PPh3)4 Place of Origin:Shanghai China (Mainland)
Purity:99.9% Appearance:yellow powder Palladium content:9.2%
Packing:Nitrogen bottle properties: instable in the air, soluble in toluene
Melting point:100-105°c
| Packaging Detail: | 10g 100g,500g,1kg |
| Delivery Detail: | 3days |
Specifications
14221-01-3 tetrakis(triphenylphosphine)palladium (0)/14221-01-3/Pd(PPh3)4
Packge import from German,can keep 3month
Cas No.: 14221-01-3
Molecular formula: Pd(P(C6H5)3)4 or Pd(PPh3)4
Molecular weight: 1155.5
Palladium content: 9.2%
Property: Light yellow powder, instable in the air, soluble in toluene
Stock:5kg usually
Package:Nitrogen bottle
Validity:3 to 6month
Tetrakis(triphenylphosphine)palladium(0) is the chemical compound Pd[P(C6H5)3]4, often abbreviated Pd(PPh3)4, or even PdP4. It is a bright yellow crystalline solid that becomes brown upon decomposition in air.
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[edit] Structure and properties
The four phosphorus atoms are at the corners of a tetrahedron surrounding the palladium(0) center. This structure is typical for four-coordinate 18e complexes.[1] The corresponding complexes Ni(PPh3)4 and Pt(PPh3)4 are also well known. Such complexes reversibly dissociate PPh3 ligands in solution, so reactions attributed to Pd(PPh3)4 often in fact arise from Pd(PPh3)3 or even Pd(PPh3)2.
[edit] Preparation
Tetrakis(triphenylphosphine)palladium(0) was first prepared by Lamberto Malatesta and his group in Milan in the 1960s by reduction of sodium chloropalladate with hydrazine in the presence of the phosphine.[2] It is commercially available, but can be prepared in two steps from Pd(II) precursors:
- PdCl2 + 2 PPh3 → cis-PdCl2(PPh3)2
- cis-PdCl2(PPh3)2 + 2 PPh3 + 2.5 N2H4 → Pd(PPh3)4 + 0.5 N2 + 2 N2H5+Cl-
Both steps may be carried out in a one-pot reaction, without isolating and purifying the cis-PdCl2(PPh3)2 intermediate.[3] Reductants other than hydrazine can be employed. The compound is sensitive to air, but can be purified by washing with methanol to give the desired yellow powder. It is usually stored cold under argon.
[edit] Applications
Pd(PPh3)4 is widely used as a catalyst for palladium-catalyzed coupling reactions.[4] Prominent applications include the Heck reaction, Suzuki coupling, Stille coupling, Sonogashira coupling, and Negishi coupling. These processes begin with two successive ligand dissociations followed by the oxidative addition of an aryl halide to the Pd(0) center:
- Pd(PPh3)4 + ArBr → PdBr(Ar)(PPh3)2 + 2 PPh3
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- Jack Zhao
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We are one of the leading manufacturers of fine chemicals (including OLED materials,Pharmaceutical Intermediates and noble metal catalysts,etc) in China with more than 10 years' experience.We have been becoming the reliable supplier of many companies.If we have a luck to be the partner of you, we can provide competitive and attractive products for you .
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