[34767-44-7]  · C5H5Cl3Zr  · Trichloro(cyclopentadienyl)zirconium  · (MW 262.67)

(catalyst for alkene polymerization2-4)

Physical Data: mp 237-238 °C (dec).

Solubility: insol most noncoordinating solvents; however, it becomes sol in benzene or chloroform in the presence of two equiv of donor agents such as ether, THF, triethylamine, or pyridine.

Form Supplied in: cream solid; readily available as a powder or as the 1,2-dimethoxyethane adduct, CpZrCl3.DME.4

Preparative Methods: photoinduced chlorination of Dichlorobis(cyclopentadienyl)zirconium.1

Purification: can be purified by vacuum sublimation.

Handling, Storage, and Precautions: solid material is moisture sensitive.

Catalyst for Alkene Polymerization.2-4

Trichloro(cyclopentadienyl)zirconium, along with methylaluminoxane (MAO) as co-catalyst, has been mainly used as a catalyst of alkene polymerizations in Ziegler-Natta type processes. Thus 1,5-hexadiene2 (eq 1) and ethylene3,4 undergo cyclopolymerization in the presence of CpZrCl3/MAO.

Precursor for the Synthesis of Other Organometallic Intermediates.

Other Zr-containing organometallic complexes can be synthesized from CpZrCl3. Thus optically active (1) was prepared according to eq 2.5

Similarly, an allyl-zirconium complex (2) was obtained as shown in eq 3.6

Related Reagents.


1. Erker, G.; Berg, K.; Treschanke, L.; Engel, K. IC 1982, 21, 1277.
2. Cavallo, L.; Guerra, G.; Corradini, P.; Resconi, L.; Waymouth, R. M. Macromolecules 1993, 26, 260.
3. Chien, J. C. W.; Wang, B.-P. J. Polym. Sci., Part A: Polym. Chem. 1989, 27, 1539.
4. Chien, J. C. W.; Wang, B.-P. J. Polym. Sci., Part A: Polym. Chem. 1990, 28, 15.
5. Moriarty, K. J.; Rogers, R. D.; Paquette, L. A. OM 1989, 8, 1512.
6. Erker, G.; Berg, K.; Angermund, K.; Krüger, C. OM 1987, 6, 2620.

Eduardo Peña-Cabrera

Emory University, Atlanta, GA, USA

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