Method of producing Ph.sub.3 C[B(C.sub.6 F.sub.5).sub.4 ]

Details Method of producing Ph.sub.3 C[B(C.sub.6 F.sub.5).sub.4 ] Method of producing Ph.sub.3 C[B(C.sub.6 F.sub.5).sub.4 ]

1993-10-12

1995-03-21

Richter, Johann

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

Organic compounds

Boron containing

C07F 502

Patent

active

053997816

ABSTRACT:
A method for producing Ph.sub.3 C[B(C.sub.6 F.sub.5).sub.4 ] in an improved yield by reacting LiB(C.sub.6 F.sub.5).sub.4, which has not been isolated between production and use, with Ph.sub.3 CCl preferably in a molar ratio of LiB(C.sub.6 F.sub.5).sub.4 to Ph.sub.3 CCl of 1:(1.+-.0.05), and preferably in the presence of a hydrocarbon solvent such as an aliphatic hydrocarbon containing from 5 to 8 carbon atoms, to give a Ph.sub.3 C[B(C.sub.6 F.sub.5).sub.4 ] product; optionally evaporating the hydrocarbon solvent; extracting the resulting Ph.sub.3 C[B(C.sub.6 F.sub.5).sub.4 ] product; separating insoluble LiCl, and isolating the product. The product may be isolated, for example, by freeing it of solvent, thereafter dissolving the product in toluene to form a toluene solution, introducing the toluene solution into a hydrocarbon solvent to form crystals of the product, and recovering the crystals. In the method, the LiB(C.sub.6 F.sub.5).sub.4 is used in the form of a hydrocarbon preparation, preferably a reaction mixture obtained in the synthesis of LiB(C.sub.6 F.sub.5).sub. 4, the concentration of may be adjusted by concentrating or diluting as needed to obtain a preferred LiB(C.sub.6 F.sub.5).sub.4 concentration of from 20 to 300 grams/liter.

REFERENCES:
Chien et al., "Isospecific Polymerization of Propylene . . . ", J. Am. Chem. Soc., vol. 113, pp. 8570-8571 (1991).

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