Process for preparing alkylsubstituted cyclopentadienyl metalloc

Details Process for preparing alkylsubstituted cyclopentadienyl metalloc Process for preparing alkylsubstituted cyclopentadienyl metalloc

1995-01-23

1996-10-29

Nazario-Gonzales, Porfirio

Organic compounds -- part of the class 532-570 series

Organic compounds

Radioactive metal containing

556 43, 556 52, 556 53, 556 58, 556 70, 556 87, 556136, 556140, 556143, C07F 500, C07F 1700, C07F 700

Patent

active

055697461

ABSTRACT:
A process for making a metallocene, said process comprising the steps of (a) reacting an alkylsubstituted cyclopentadiene ligand, which contains a mixture of endo- and exo-isomers, with up to about a 10% excess over a stoichiometric amount of a deprotonation agent based on the amount of endo-isomers, so as to form a salt of said endo-isomers, (b) reacting the endo-isomer salt with a transition or actinide metal compound so as to form said metallocene and (c) optionally separating said exo-isomers and trace amounts of unreacted endo-isomers from said metallocene by distillation.

REFERENCES:
patent: 4874880 (1989-10-01), Miya et al.
patent: 5200537 (1993-04-01), Lee et al.
patent: 5302733 (1994-04-01), Diefenbach et al.
patent: 5359105 (1994-10-01), Strickler et al.

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