Process for the preparation of ep(d)m elastomeric copolymers and terpolymers

Metallocene compounds of general formula (I) having a racemic stereoisomerism

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• wherein
• M is selected from titanium, zirconium, hafnium;
• X1 and X2, the same or different, are selected from halogen, amide, carboxy, alkoxy, carbamate, alkyl, aryl, hydrogen;
• A′ and A″, the same or different, are a radical of the η5-tetrahydroindenyl type (ia):
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• wherein the groups R5, R6, R7, R8, R9, R10, the same or different, are selected from hydrogen, a C1-C8 aliphatic, C5-C1-2 cycloaliphatic, C6-C14 aryl radical;
• the groups R1, R2, R3, R4, the same or different, are selected from hydrogen, a C1-C8 aliphatic, C5-C12 cycloaliphatic, C6-C1-4 aryl radical, halogen.