3D model (Jmol)
|Molar mass||412.45 g·mol−1|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
1,3-Bis(diphenylphosphino)propane (dppp) is an organophosphorus compound with the formula (CH2)3(P(C6H5)2)2. The compound is a white solid that is soluble in organic solvents. It is slightly air-sensitive, degrading in air to the phosphine oxide. It is classified as a diphosphine ligand in coordination chemistry and homogeneous catalysis.
The diphosphine can be prepared by the reaction of lithium diphenylphosphide and 1,3-dichloropropane (Ph = C6H5):
- 2 Ph2PLi + C3H6Cl2 → C3H6(PPh2)2 + 2 LiCl
Coordination chemistry and use as co-catalyst
The diphosphine serves as a bidentate ligand forming six-membered C3P2M chelate ring. For example, the complex dichloro(1,3-bis(diphenylphosphino)propane)nickel is prepared by combining equimolar portions of the ligand and nickel(II) chloride hexahydrate. This nickel complex serves as a catalyst for the Kumada coupling reaction. Dppp is also used as a ligand for palladium(II) catalysts to co-polymerize carbon monoxide and ethylene to give polyketones. Dppp can sometimes be used in palladium-catalyzed arylation under Heck reaction conditions to control regioselectivity.
- Kumada, Makota; Tamao, Kohei; Sumitani, Koji (1988). "Phosphine-Nickel Complex Catalyzed Cross-Coupling of Grignard Reagents with Aryl and Alkenyl Halides: 1,2-dibutylbenzene". Org. Synth.; Coll. Vol., 6, p. 407
- Drent, E.; Mul, W. P.; Smaardijk, A. A. (2001). "Polyketones". Encyclopedia Of Polymer Science and Technology. doi:10.1002/0471440264.pst273.
- Cabri, Walter; Candiani, Ilaria; Bedeschi Angelo; Penco, Sergio"α-Regioselectivity in Palladium-Catalyzed Arylation of Acyclic Enol Ethers" journal= Journal of Organic Chemistry, 1991, volume 57, p. 1481. doi:10.1021/jo00031a029