Silyl-bridged diynes

As shown in Eq. 2.59, zirconacyclopentadienes can be inserted into such a polymer chain (lq) from the beginning. The polymer can then be converted into polyphenylenes 88 in good yields [43]. Silyl-bridged diynes react with Cp2ZrBu2 to afford a macrocyclic tri-mer (89), as shown in Eq. 2.60 [43]. 

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