CPC C08F 210/16 (2013.01) [B01J 8/24 (2013.01); C07F 7/003 (2013.01)] | 15 Claims |
1. A compound of formula (1):
wherein M is Zr or Hf; one R independently is an unsubstituted or substituted quaternary-silahydrocarbyl group; and the other R is an unsubstituted or substituted quaternary-silahydrocarbyl group or an unsubstituted or substituted (aryl)alkyl group.
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