Ligand exchange in zirconocene dichloride–diethylzinc bimetallic systems

16 December 2021, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

The reaction between zirconocene dichloride and excess diethylzinc in d-6-benzene solution was studied. It was found that the exchange reaction between Cp2ZrCl2 and Et2Zn is accompanied by the formation of such complexes as bis-(cyclopentadienyl)ethylzirconium chloride (EtZrCp2Cl), a zirconium-organozinc complex, and bis-(cyclopentadienyl)diethylzirconium (Et2ZrCp2). It was also found that as a result of ligand exchange in zirconocene dichloride–diethylzinc bimetallic systems, the zirconium-organozinc complex is formed in minor amounts. An assessment of the thermodynamic stability of the obtained products is given based on the results of DFT analysis. The description of the NMR spectral data of the obtained organozirconium complexes is carried out.

Keywords

Zirconocene dichloride
diethylzinc
bis-(cyclopentadienyl)ethyl zirconium chloride
ligand exchange

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