1,2-Bis(dimethylphosphino)ethane on:
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1,2-Bis(dimethylphosphino)ethane (dmpe) is a diphosphine ligand in 
coordination chemistry
A coordination complex consists of a central atom or ion, which is usually metallic and is called the ''coordination centre'', and a surrounding array of bound molecules or ions, that are in turn known as ''ligands'' or complexing agents. Man ...
. It is a colorless, air-sensitive liquid that is soluble in organic solvents. With the formula (CHPMe), dmpe is used as a compact strongly basic spectator ligand In coordination chemistry, a spectator ligand is a ligand that does not participate in chemical reactions of the complex. Instead, spectator ligands (vs "actor ligands") occupy coordination sites. Spectator ligands tend to be of polydentate, such ...
(Me = methyl
In organic chemistry, a methyl group is an alkyl derived from methane, containing one carbon atom bonded to three hydrogen atoms, having chemical formula . In formulas, the group is often abbreviated as Me. This hydrocarbon group occurs in ...
), Representative complexes include V(dmpe)(BH), Mn(dmpe)(AlH), Tc(dmpe)(CO)Cl, and Ni(dmpe)Cl.
Synthesis
It is synthesised by the reaction of methylmagnesium iodide with 1,2-bis(dichlorophosphino)ethane: :ClPCHCHPCl + 4 MeMgI → MePCHCHPMe + 4 MgICl Alternatively it can be generated by alkylation of sodium dimethylphosphide. The synthesis of dmpe from thiophosphoryl chloride has led to serious accidents and has been abandoned.}Related ligands
* Bis(dicyclohexylphosphino)ethane, a bulkier analogue, which is also a solid. *1,2-Bis(diphenylphosphino)ethane
1,2-Bis(diphenylphosphino)ethane (dppe) is an organophosphorus compound with the formula (PhPCH) (Ph = phenyl). It is a commonly used bidentate ligand in coordination chemistry. It is a white solid that is soluble in organic solvents.
Preparatio ...
, more air-stable than dmpe, but less basic.
* 1,2-Bis(dimethylphosphino)benzene, a more rigid analogue of dmpe.
* Tetramethylethylenediamine, the diamine analogue of dmpe.
References
{{DEFAULTSORT:Bis(dimethylphosphino)ethane, 1, 2- Chelating agents Diphosphines 1,2-Ethanediyl compounds