Preparation of tetrabromotetrachloroperfluorododecanes

Details Preparation of tetrabromotetrachloroperfluorododecanes Preparation of tetrabromotetrachloroperfluorododecanes

1978-06-19

1981-12-22

Gantz, Delbert E.

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

Organic compounds

Halogen containing

570172, 570171, C07C 1726

Patent

active

043072593

ABSTRACT:
A substantially pure mixture of tetrabromotetrachloroperfluorododecanes of the empirical formula C.sub.12 Br.sub.4 Cl.sub.4 F.sub.18, of which the isomer ##STR1## is a significant part, is prepared by oligomerizing bromotrifluoroethylene in the presence of chlorine and distilling, thereby obtaining a substantially pure mixture of trimers of the empirical formula C.sub.6 Br.sub.3 Cl.sub.2 F.sub.9, of which the isomer ##STR2## is a significant part and reacting the trimer mixture with zinc in the presence of acetic anhydride to form a perhalododecane. The product is especially useful as a gyroscopic flotation fluid because of its stability, homogeneity and density.

REFERENCES:
patent: 2705229 (1955-03-01), Ruh et al.
patent: 2783219 (1957-02-01), Passino et al.
patent: 3046304 (1962-07-01), Haszeldine

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