Metal alkyls diethyl zinc

General caution and safety. The metal alkyls trimethylaluminum, trimethylgallium, trimethylindium, triethylindium, dimethylzinc, and diethyl-zinc all spontaneously inflame in air (pyrophoric) and are violently reactive toward water and carbon dioxide. Dimethylcadmium fumes upon exposure to air but does not inflame, and decomposes, sluggishly, in water. As with cadmium dichloride, and in common with all cadmium compounds, dimethylcadmium is extremely toxic. A dry powder extinguisher, sand bucket, and fire blanket should be at hand at all times. 

Although much of the chemistry of organometallics is of recent development, such compounds have been known for many years. Zeise s salt, a metal olefin complex having the formula K[Pt(C2H4)Cl3], was prepared in 1825. The first metal alkyl has been known since 1849 when Frankland prepared diethyl zinc by the reaction... 

These compounds were not isolated but characterized by their reaction with diethyl-zinc. Pure organolithium (230) and organosodium (232) compounds were prepared by Schlenck and co-workers, while Gilman and Young prepared the first pure alkyl compounds of the heavier alkali metals (114). 

Pyridines are often used as catalysts or reagents particular notice has been paid recently to how pyridine coordinates to metal centers enabling a wide range of valuable reactions. Chiral pyridine-iridinium complexes, where an N-heterocyclic carbene replaces the phosphinite in Crabtree-type catalysts, have been shown to provide efficient, enantioselective hydrogenation (13AG(1)7422). Chiral-2-pyridylsulfinamides induce excellent enantiose-lecivity in the addition of diethyl zinc to aryl and alkyl aldehydes (13T8422). 

For ZnO growth, OMVPE/MOVPE technique typically involves the use of metal alkyls, usually dimethyl zinc (CH3)2Zn (DMZn) or diethyl zinc (C2Hs)2Zn (DEZn) in combination with a separate source of oxygen and argon or nitrogen as a carrier gas. 

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