(a) Why is it easier to investigate the Cossee–Arlman mechanism using metallocene alkene polymerization catalysts rather than Ziegler–Natta catalysts?

(b) The zirconium complex shown below is an active catalyst for the polymerization of RCH=CH₂. Draw a scheme to illustrate the mechanism of this reaction, assuming that it follows the Cossee–Arlman pathway.

Transcribed Image Text:

O Ō Zr - Me +