Gallium metal reactions with

Metallic Antimonides. Numerous binary compounds of antimony with metallic elements are known. The most important of these are indium antimonide [1312-41 -0] InSb, gallium antimonide [12064-03-8] GaSb, and aluminum antimonide [25152-52-7] AlSb, which find extensive use as semiconductors. The alkali metal antimonides, such as lithium antimonide [12057-30-6] and sodium antimonide [12058-86-5] do not consist of simple ions. Rather, there is appreciable covalent bonding between the alkali metal and the Sb as well as between pairs of Na atoms. These compounds are useful for the preparation of organoantimony compounds, such as trimethylstibine [594-10-5] (CH2)2Sb, by reaction with an organohalogen compound. 

The chalcogenide bromides and chlorides may be prepared by the reaction of the halide with the respective chalcogenide in a sealed ampoule. A mixture of gallium metal and chalcogen may be used, instead of the chalcogenide. The chalcogenide iodides are S3mthesized directly from the elements. The exact preparative conditions are listed in Table XVIII 160,165). 

The metal reacts with cold chlorine strongly exothermically, and the compact metal with bromine even at -33°C, reaction being violent at ambient temperature [1], Interaction of gallium with liquid bromine at 0°C proceeds with a flash, resembling the action of alkali metals with water [2],... 

PROBLEM 14.3 Write a balanced net ionic equation for the reaction of gallium metal with dilute acid. 

Allylgallium and propargylgallium compounds can be prepared by the direct reaction of the corresponding bromides or iodides with gallium metal.402,403Gallium enolates are also prepared from a-halo carbonyl compounds with gallium.404... 

Attempts were made to extend the r,(7-transfer of allyl ligand from palladium to other, metals (fdf) (magnesium, copper, zinc, cadmium, and liquid gallium). It has been found that these metals do not form their respective allyl derivatives in reaction with rr-allyl-palladium chloride. 

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