GaC2H53

GaC2H53 is the formula commonly used to denote gallium triethyl, Ga(C2H5)3, an organogallium compound in which a gallium(III) center is bonded to three ethyl groups. The compound is discussed in organometallic chemistry as a volatile, alkylating gallium precursor and as a reagent for introducing Ga–C bonds into synthetic routes. The exact physical form (color, state) can vary with temperature and purity, and the compound is typically handled under inert atmosphere due to sensitivity to air and moisture.

Structure and properties

Ga(C2H5)3 consists of a gallium center coordinated to three ethyl ligands. In organogallium chemistry, such species are described as three-coordinate Ga(III) complexes that can exhibit a distorted tetrahedral environment depending on ligands and aggregation state. The compound is generally reactive toward oxidants and hydrolyzes upon exposure to water or oxygen, producing gallium hydroxide and hydrocarbon byproducts (for example, hydrolysis of analogous AlEt3 yields Al(OH)3 and ethane).

Synthesis and handling

GaEt3 is typically prepared by alkylation of gallium trihalides with ethylating agents, such as Grignard reagents or organolithium reagents. A representative route is GaCl3 reacting with ethylmagnesium bromide (EtMgBr) to yield GaEt3 and magnesium halide byproducts. Because of air and moisture sensitivity, preparations and handling are conducted under inert gas with appropriate containment.

Applications

Ga(C2H5)3 serves as a volatile gallium source in chemical vapor deposition (CVD) and related deposition techniques for gallium-containing films and materials. It also functions as a reagent for transferring ethyl groups in organometallic synthesis and as a precursor in the preparation of more complex gallium organometallic compounds.

Safety

The compound is toxic and reactive toward air and water. It should be stored and used under inert atmosphere, with appropriate precautions for flammable solvents and pyrophoric reagents. Proper disposal and ventilation are essential to minimize exposure to vapors and byproducts. See organogallium compound literature for detailed safety handling.