Product Overview

1,2-Bis(diphenylphosphino)ethane (DPPE) is an organophosphorus compound with the molecular formula C₂₆H₂₄P₂ and molecular weight of 398.42 g/mol. This white to off-white crystalline solid is one of the most widely used bidentate phosphine ligands in coordination chemistry and homogeneous catalysis. DPPE forms stable chelate complexes with various transition metals, enabling a wide range of catalytic transformations.

Synthetic Process

• Synthesis: DPPE is typically prepared by the reaction of chlorodiphenylphosphine with 1,2-dibromoethane in the presence of a base or through the reaction of diphenylphosphine with 1,2-dichloroethane

• Purification: The crude product is purified by recrystallization from ethanol or other suitable solvents

• Drying: The purified product is dried under vacuum to yield the final crystalline compound

Mechanism of Action

• Bidentate Coordination: DPPE coordinates to metals through both phosphorus atoms, forming stable five-membered chelate rings

• Catalytic Applications: DPPE-metal complexes are effective catalysts for hydrogenation, hydroformylation, cross-coupling, and polymerization reactions

• Electronic Properties: The phosphine ligands provide electron density to metal centers, enhancing catalytic activity

• Steric Effects: The flexible ethylene backbone allows for conformational changes that can influence selectivity in catalytic transformations

Research Applications & Market Significance

• Homogeneous Catalysis: Key ligand for hydrogenation, hydroformylation, and carbon-carbon bond formation

• Cross-Coupling Reactions: Used in palladium-catalyzed Heck, Suzuki, and Stille couplings

• Organometallic Chemistry: Essential reagent for the preparation of metal complexes and organometallic compounds

• Polymerization: Used in nickel- and palladium-catalyzed polymerization reactions

• Materials Science: Employed in the synthesis of functional materials and coordination polymers

Quality Specifications

• Purity: ≥98.0% (HPLC)

• Melting point: 137-142°C

• Solubility: Soluble in organic solvents

• Storage: 2-8°C, under inert atmosphere, protected from light

• Stable for 24 months when properly stored

Packaging & Shipping

• Research quantities: 1g, 5g amber glass vials

• Bulk quantities: 25g, 100g amber glass bottles

• Shipped under inert atmosphere for high-purity grades