with Et 2 Zn are preseted in for the first time in . Studying the alkyl transfer processes in the Cp 2 ZrCl 2 -Et 2 Zn system is an important task, since they are central to coordinative chain transfer olefin polymerization catalysis. This work presents the first results of studying the exchange reaction between zirconocene dichloride (Cp 2 ZrCl 2 ) and Et 2 Zn.