Dimethylzinc

• Zinc dimethyl
• DMZ

Spontaneously flammable liquid

Liquid

1.386 g · cm -3

-40 ° C

46 ° C.

Violent reaction with water

Risk

23.4 kJ / mol

Template: Infobox chemical / molecular formula search available

Dimethylzinc is a chemical compound selected from the group of the organic zinc compounds.

History

Dimethyl zinc was first produced by Edward Frankland during his work with Robert Bunsen in 1849 at the University of Marburg (to create when trying radicals). After heating a mixture of zinc and methyl iodide in a sealed vessel, there was a tongue of flame, after the seal has been opened.

Production and representation

Dimethylzinc may be obtained by reaction of methyl iodide with zinc, dimethyl zinc and zinc iodide is formed next.

Properties

Dimethylzinc is a pyrophoric liquid which reacts violently on contact with moisture or humid air. The technical product is traded in solution in heptane or toluene.

Structure

In the solid state the compound exists in two modifications. The high temperature phase has a two-dimensional dislocation as the low-temperature phase is ordered. The molecules are linear; Zn -C bond length of 1.927 (6) microns. In the gas phase, a Zn - C distance of 193.0 (2) pm was measured.

Use

Dimethylzinc can be used instead of the corresponding lithium or magnesium compounds in organic synthesis, if you want to organyliert under relatively mild and non-basic conditions. Because of the high vapor pressure of dimethyl zinc is an excellent starting material for the metal organic chemical vapor deposition ( engl. metal organic chemical vapor deposition, MOCVD ) of II- VI semiconductor layers (eg, ZnO, ZnS, ZnSe, ZnTe ) and p- doped III- V semiconductors (e.g., GaAs, InP, Al x Ga 1 -x As ), which have a variety of electronic and optoelectronic applications.