Palladium(II) acetylacetonate, as know as Bis(2,4-pentanedionato-O,O')palladium(II), molecular formula C10H14O4Pd, CAS 14024-61-4, is a yellow solid powder at room temperature and pressure, with uniform color and no obvious impurities. Low volatility, not easy to spontaneously evaporate or sublime at room temperature. Soluble in various common organic solvents such as benzene, toluene, dichloromethane, chloroform, etc. These solvents are commonly used for their synthesis, purification, and solvent selection in catalytic reactions. Insoluble in water and does not undergo chemical reactions with water under neutral conditions, exhibiting good chemical stability. This property makes it particularly useful in catalytic reactions that require avoidance of reaction with water. It is an important metal palladium catalyst with wide applications in organic synthesis, drug development, and materials science.
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Chemical Formula |
C20H15N4NaO6S2 |
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Exact Mass |
492.02 |
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Molecular Weight |
492.46 |
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m/z |
92.02 (100.0%), 493.02 (21.6%), 494.01 (9.0%), 494.02 (2.2%), 495.02 (2.0%), 493.02 (1.6%), 493.01 (1.5%), 494.02 (1.2%) |
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Elemental Analysis |
C, 48.78; H, 2.66; N, 11.38; Na, 4.67; O, 19.49; S, 13.02 |
Palladium(II) acetylacetonate (chemical formula C10H16O4Pd), also known as diacetylacetonate palladium, is an important organic compound with wide applications in various fields.
In the field of organic synthesis, di (acetylacetonate) palladium (II) is the most widely used. As an efficient catalyst, it can catalyze various organic conversion reactions, which provide effective means for synthesizing complex organic compounds and promote the development of organic synthesis chemistry.
(1) Hydrogenation reaction
Capable of catalyzing hydrogenation reactions of olefins and aromatic compounds. Hydrogenation reaction is an important type of reaction in organic chemistry. By introducing hydrogen atoms, the structure and properties of organic molecules can be altered, resulting in the formation of new organic compounds. For example, olefins can undergo addition reactions with hydrogen gas under the catalysis of palladium (II) acetylacetonate to produce alkanes.
(2) Activation of Inert C-H Bonds
In organic molecules, C-H bonds are relatively stable and difficult to activate chemical bonds. However, it can catalyze the activation reaction of inert C-H bonds, causing them to break under specific conditions and form new chemical bonds. This activation reaction provides a new pathway and strategy for organic synthesis.
(3) Hydrogen functionalization reaction of unsaturated bonds
Unsaturated bonds (such as carbon carbon double bonds, carbon carbon triple bonds, etc.) are common functional groups in organic molecules. It can catalyze the hydrogen functionalization reaction of unsaturated bonds, causing the unsaturated bonds to undergo addition or reduction reactions under the action of hydrogen atoms, generating new organic compounds. This type of reaction has wide application value in fields such as drug synthesis and material preparation.
In the field of drug synthesis, it also plays an important role. It can catalyze the synthesis reactions of various drug intermediates, improving the efficiency and yield of drug synthesis. Meanwhile, its excellent catalytic selectivity and stability also ensure the purity and activity of drug molecules.
(1) Synthesis of catalytic drug intermediates
The synthesis of drug intermediates is a crucial step in the drug development process. As a catalyst, it can accelerate the synthesis reaction of drug intermediates, improve reaction rate and yield. For example, in the synthesis of certain antibiotics, key step reactions can be catalyzed to obtain high-purity drug intermediates.
(2) Improve the purity and activity of drug molecules
The purity and activity of drug molecules are important indicators for measuring drug quality. As a catalyst, it can maintain high catalytic selectivity and stability in the process of catalyzing drug synthesis reactions, thereby ensuring the purity and activity of drug molecules. This is of great significance for improving the quality and efficacy of drugs.
In the field of materials science, it is used to prepare nanomaterials and composite materials with special properties. These materials have broad application prospects in fields such as electronics, optics, catalysis, etc., providing strong support for the research and application of new materials.
(1) Preparation of nanomaterials
Nanomaterials are materials with special physical and chemical properties. It can be used as a precursor or catalyst for the preparation of various nanomaterials. For example, palladium nanoparticles with high catalytic activity can be obtained by pyrolyzing the precursor of palladium(II) acetylacetonate. These nanoparticles have wide application value in catalytic reactions, sensors, fuel cells, and other fields.
(2) Preparation of composite materials
Composite materials are materials with new properties composed of two or more materials with different properties. It can be used as an additive or catalyst to prepare various composite materials. For example, adding di (acetylacetonate) palladium (II) to a polymer matrix can result in polymer composites with excellent catalytic performance. These composite materials have broad application prospects in fields such as environmental protection and water treatment.
In addition to the aforementioned fields, it also has extensive applications in other areas.
(1) Carbonylation reaction
Carbonylation reaction is an important type of organic chemical reaction, which can change the structure and properties of organic molecules by introducing carbonyl (C=O) functional groups. Can catalyze various carbonylation reactions, such as carbonylation of olefins, carbonylation of aromatic compounds, etc. These reactions provide new pathways and strategies for synthesizing complex organic compounds.
(2) Oligomerization reaction
Oligomerization reaction refers to the process of connecting small molecule compounds into larger molecules through chemical bonds. It can catalyze various oligomerization reactions, such as the oligomerization of olefins and aromatic compounds. These reactions have wide application value in the synthesis of polymer materials, polymers, and other fields.
(3) Catalyst carrier
It can also be used as a catalyst carrier to prepare catalysts with excellent catalytic performance. For example, by loading di (acetylacetonate) palladium (II) onto a carrier, a catalyst with high catalytic activity and stability can be obtained. These catalysts have broad application prospects in fields such as chemical engineering and environmental protection.
(4) Electrochemical applications
It also has a wide range of applications in the field of electrochemistry. For example, it can be used as an electrocatalyst in electrochemical devices such as fuel cells and electrolytic cells. In addition, it can also be used as a sensitive material in electrochemical sensors for detecting various chemical substances.
In summary, di (acetylacetonate) palladium (II), as an important organic compound, has broad application value in fields such as organic synthesis, drug development, and materials science. With the continuous advancement of science and technology and the increasing demand for new materials and drugs, the application fields of di (acetylacetonate) palladium (II) will become more extensive. In the future, we can look forward to seeing the presence of di (acetylacetonate) palladium (II) in more fields, making greater contributions to human technological progress and social development.
At the same time, we also need to pay attention to the possible problems and challenges in the synthesis and preservation process of di (acetylacetonate) palladium (II). For example, it is necessary to explore more efficient and environmentally friendly synthesis methods to improve the yield and purity of products; More stable storage conditions need to be studied to extend the product's lifespan and maintain its catalytic activity. In addition, it is necessary to strengthen the toxicity assessment and safety research of it to ensure its safety and reliability in the application process.
The synthesis methods of Palladium(II) acetylacetonate mainly include the following:
Step Overview
Dissolve soluble potassium or sodium salts and soluble palladium salts in deionized water at a relatively mild temperature.
Under the action of strong alkali, palladium salt is transformed into Pd (OH) 2.
Directly adding acetylacetone to the reaction mixture containing Pd (OH) 2, the α - active H atom in the acetylacetone molecule undergoes neutralization reaction with Pd (OH) 2 to generate di (acetylacetone) palladium (II).
advantage
Mild reaction conditions and simple process.
High product yield and purity are commonly used methods in industrial production.
Step Overview
Mix acetylacetone with excess palladium (II) oxidant (such as palladium (II) peroxide).
Add solvents (such as water and ethanol) to completely dissolve it.
After reacting at room temperature for 12 hours, di (acetylacetonate) palladium (II) crystals can be obtained.
Step Overview
Mix acetylacetone with palladium (II) oxidant (such as palladium (II) peroxide).
Add a catalyst (such as diphenylpalladium (II) sulfate or ethanol) to completely dissolve it.
After 6-8 hours of reaction at room temperature, di (acetylacetonate) palladium (II) crystals can be obtained.
Step Overview
Mix acetylacetone with palladium (II) oxidant (such as palladium (II) peroxide).
Add a catalyst (such as ethanol) to completely dissolve it.
After 6-8 hours of reaction at room temperature, di (acetylacetonate) palladium (II) crystals can be obtained.
In addition to the above methods, di (acetylacetonate) palladium (II) can also be synthesized through other pathways, such as:
Suspend palladium dichloride in hot water and add acetylacetone neutralized with KOH to form a brown precipitate that turns yellow. Continue to add neutralized acetylacetone, collect the yellow precipitate, dry and recrystallize in benzene to obtain yellow needle shaped crystals of di (acetylacetone) palladium (II).
Take a certain concentration of NaOH solution and add a mixed solution consisting of acetylacetone and a certain concentration of Na2 [PdCl4] solution while stirring. The reaction produces a yellow precipitate, which is filtered and washed. Dissolve the yellow powder in dichloromethane and filter to remove a small amount of insoluble substances. The filtrate can be evaporated at room temperature to remove the solvent and obtain crystals of di (acetylacetonate) palladium (II).
These methods each have their own characteristics, and suitable methods can be selected for synthesis based on specific needs and experimental conditions. Meanwhile, it is necessary to pay attention to controlling the reaction conditions during the synthesis process, such as temperature, solvent selection, reaction time, etc., to ensure the quality and yield of the product.
FAQ
What is palladium II bis acetylacetonate?
Palladium(II) bis(acetylacetonate) is a compound with formula Pd(C5H7O2)2. This yellow solid is the most common palladium complex of acetylacetonate. This compound is commercially available and used as a catalyst precursor in organic synthesis. The molecule is relatively planar with idealized D2h symmetry.
What does Pd OAc 2 do?
Palladium(II) acetate is a chemical compound of palladium described by the formula [Pd(O2CCH3)2]n, abbreviated [Pd(OAc)2]n. It is more reactive than the analogous platinum compound. Depending on the value of n, the compound is soluble in many organic solvents and is commonly used as a catalyst for organic reactions.
What is Acetylacetone used for?
Acetylacetone is a versatile chemical used in organic synthesis, particularly as a building block for pharmaceuticals and agrochemicals. It is also widely employed as a chelating agent to form metal complexes used as catalysts, stabilizers, and additives in fuels, lubricants, and coatings. Other applications include its use as a solvent and in the production of pigments, fragrances, and certain plastics
What is the use of palladium acetate?
Palladium acetate (Pd-acetate) is a common catalyst used in a wide array of organic synthetic reactions in non-aqueous solvents. Due to its high cost and associated toxicity/contamination issues in reaction mixtures, Pd removal and recovery is essential.
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