| abstract |
This invention provides a process of preparing dihydrocarbylamido metal compounds. This process comprises bringing together, in a liquid reaction medium, at least one metal halide, MX4, where M is titanium, zirconium, or hafnium, and X is a halogen atom, with at least one dihydrocarbylamine, such that a mixture of (I) halometal amides in which the atom ratio of halogen to metal is greater than 0.1 and less than 2, and (ii) dihydrocarbylamine hydrohalide is produced. Then (I) and (ii) are separated from each other, and (I) is brought together with an alkali metal amide, ANR2, where A is an alkali metal, and R is a hydrocarbyl group, in a liquid medium, to produce a product comprised of substantially halogen-free dihydrocarbylamido metal compound. This invention further provides for purifying dihydrocarbylamido metal compounds by contact with a nitrile. |