[EN] RACEMOSELECTIVE PREPARATION OF BRIDGED METALLOCENE COMPLEXES HAVING UNSUBSTITUTED OR 2-SUBSTITUTED INDENYL LIGANDS [FR] PREPARATION RACEMOSELECTIVE DE COMPLEXES METALLOCENES PONTES RENFERMANT DES LIGANDS INDENYL NON SUBSTITUES OU 2-SUBSTITUES
[EN] RACEMOSELECTIVE PREPARATION OF BRIDGED METALLOCENE COMPLEXES HAVING UNSUBSTITUTED OR 2-SUBSTITUTED INDENYL LIGANDS [FR] PREPARATION RACEMOSELECTIVE DE COMPLEXES METALLOCENES PONTES RENFERMANT DES LIGANDS INDENYL NON SUBSTITUES OU 2-SUBSTITUES