1,2-bis (dimethylphosphino) ethane

Structural formula
General
Surname	1,2-bis (dimethylphosphino) ethane
other names	DMPE; (Ethane-1,2-diyl) bis (dimethylphosphine) ( IUPAC );
Molecular formula	C 6 H 16 P 2
Brief description	colorless liquid
External identifiers / databases
EC number	627-450-6
ECHA InfoCard	100.155.809
PubChem	141059
ChemSpider	124423
Wikidata	Q2462507
properties
Molar mass	150.07 g mol −1
Physical state	liquid
density	0.9 g cm −3 at 25 ° C
boiling point	180 ° C
safety instructions
H and P phrases	H: 225-315-319-335
	P: 210-261-305 + 351 + 338
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

1,2-Bis (dimethylphosphino) ethane ( dmpe ) is a diphosphine with frequent use in coordination chemistry . It serves as a strongly basic observer ligand. Representative complexes are V (dmpe) ₂ (BH ₄ ) ₂ , Mn (dmpe) ₂ (AlH ₄ ), Tc (dmpe) ₂ (CO) ₂ Cl, and Ni (dmpe) Cl ₂ .

Structure of trans -CoCl ₂ (dmpe) ₂ ( P is colored ocher, Co blue and Cl green.)

It is a colorless, air-sensitive liquid that is soluble in organic solvents.

synthesis

The synthesis is carried out by reacting methyl magnesium iodide with 1,2-bis (dichlorophosphino) ethane:

Alternatively, dmpe can also be obtained by alkylating sodium dimethyl phosphide .

The synthesis from thiophosphoryl trichloride has led to serious accidents and should no longer be used.

Related ligands

Tetramethylethylenediamine is the diamine analog from dmpe. Bis (dicyclohexylphosphino) ethane is a sterically more demanding analogue, which also has the advantage of being a solid.

Individual evidence

↑ ^a ^b ^c ^d ^e data sheet 1,2-bis (dimethylphosphino) ethane from Sigma-Aldrich , accessed on October 13, 2019 ( PDF ).
↑ JE Bercaw, GW Parshall: Preparation of Tetramethyldiphosphine disulfides and Ethylenebis (Dimethylphosphine) (DMPE) . In: Inorganic Syntheses . John Wiley & Sons, Inc., Hoboken, NJ, USA 2007, ISBN 978-0-470-13254-8 , pp. 199-200 , doi : 10.1002 / 9780470132548.ch42 .
↑ RJ Burt, J. Chatt, W. Hussain, GJ Leigh: A convenient synthesis of 1,2-bis (dichlorophosphino) ethane, 1,2-bis (dimethylphosphino) ethane and 1,2-bis (diethylphosphino) ethane . In: J. Organomet. Chem. . 182, No. 2, 1979, pp. 203-206. doi : 10.1016 / S0022-328X (00) 94383-3 .
↑ JE Bercaw, GW Parshall: Preparation of Tetramethyldiphosphine Disulfide and Ethylenebis (dimethylphosphine) (dmpe) , Inorganic Syntheses 1985, vol. 23, p. 199-200, doi : 10.1002 / 9780470132548.ch42 .

[sigma-1] ↑ ^a ^b ^c ^d ^e data sheet 1,2-bis (dimethylphosphino) ethane from Sigma-Aldrich , accessed on October 13, 2019 ( PDF ).

[2] JE Bercaw, GW Parshall: Preparation of Tetramethyldiphosphine disulfides and Ethylenebis (Dimethylphosphine) (DMPE) . In: Inorganic Syntheses . John Wiley & Sons, Inc., Hoboken, NJ, USA 2007, ISBN 978-0-470-13254-8 , pp. 199-200 , doi : 10.1002 / 9780470132548.ch42 .

[3] RJ Burt, J. Chatt, W. Hussain, GJ Leigh: A convenient synthesis of 1,2-bis (dichlorophosphino) ethane, 1,2-bis (dimethylphosphino) ethane and 1,2-bis (diethylphosphino) ethane . In: J. Organomet. Chem. . 182, No. 2, 1979, pp. 203-206. doi : 10.1016 / S0022-328X (00) 94383-3 .

[4] JE Bercaw, GW Parshall: Preparation of Tetramethyldiphosphine Disulfide and Ethylenebis (dimethylphosphine) (dmpe) , Inorganic Syntheses 1985, vol. 23, p. 199-200, doi : 10.1002 / 9780470132548.ch42 .