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General Information:


CAS Number: 1663-45-2

Molecular Weight: 398.42 g/mol

Appearance: White solid

Melting Point: 137-142 C

1,2-Bis(diphenylphosphino)ethane (Dppe) is a bidentate ligand used typically in coordination chemistry. Dppe is generally a chelating ligand. Common applications include palladium chemistry, but can also include other transition metals such as nickel or iridium.

Dppe can also make a useful replacement for triphenylphosphine in reactions such as Mitsunobu or Staudinger reactions. The corresponding bis(phosphine oxide) by-pdt is more polar than triphenylphosphine oxide, making it often easier to separate from desired products.


1) Wikipedia: 1,2-Bis(diphenylphosphino)ethane (link)

2) Ethylenebis(diphenylphosphine) (link)

3) 1,2-Bis(diphenylphosphino)ethane (link)

4) A11419 1,2-Bis(diphenylphosphino)ethane, 97+% (link)

5) Molander, G. A.; Handbook of Reagents for Organic Synthesis, Catalyst Components for Coupling Reactions