| http://www.w3.org/ns/prov#value | - Analogously, if the activated Mg dihalide is obtained by reacting a compound of formula RMgX, in which R is a hydrocarbon radical and X is R or a halogen, with a halogenated Ti compound, the resulting solid components, when mixed with Al alkyls, yield catalysts which do not exhibit very high activity and stereospecificity.
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