Trialkylindium compounds are prepared by reacting indium trihalide with a trialkylaluminum compound in the presence of a fluoride salt, wherein the molar ratio of the indium trihalide to the fluoride salt is at least 1:4.5. Such trialkylindium compounds are particularly suitable for use in metalorganic vapor phase epitaxy.
Organometallic compounds of Group IIB and IIIA metals that are substantially pure and contain low levels of oxygenated impurities are provided. Also provided are methods of preparing such organometallic compounds.