long‐chain branched polyethylene includes the generation of vinyl‐terminated polyethylenemacromonomers and the copolymerization of these macromonomers with ethylene. Four new bridgedcyclopentadienylindenyl (fluorenyl) zirconocenecomplexes 1a–b, 2a–b were prepared and showed high activities for ethylene homopolymerization upon the activation of methylaluminoxane. The steric bulk of bridged substituent has