Bromine fluoride, formation

Bromine (I) fluoride, formation of, in preparation of BrF3, 3 185 Bromine(III) fluoride, 3 184 Bromine (V) fluoride, formation of, in preparation of BrF3, 3 185 Bromine solution, in carbon tetrachloride, 1 86... 

It is dissolved by bromine trifluoride, to form finally gold(III) fluoride, AuFj. This is a notable compound, for in it gold exhibits a simple valency of three, whereas in all other gold(III) compounds, gold is 4-coordinate, usually by complex formation (see below). 

Here one assumes the intermediate formation of the unstable acid BrFjPFg, a view which is supported by the fact that a mixture of red phosphorus and potassium fluoride likewise dissolves in bromine trifluoride to form KPFg. 

The A-bromosuccinimidc-hydrogen fluoride/pyridine system was employed to add bromine monofluoride to chalcones in dimethylformamide with the formation of. mt-2-bromo-3-fluoro-... 

Boron trifluoride and boron trifluoride-diethyl ether complex can be used as a source of fluoride ions in the presence of hypobromites and hypochlorites, e.g. methyl hypobromitc, tert-butyl hypobromite, methyl hypochlorite in carbon tetrachloride at 25 C. The addition of bromine monofluoride" and chlorine monofluoride" to various alkenes is accompanied by the formation of the corresponding alkoxybromides and alkoxychlorides which hinder the isolation of the halofluorinated products.57 jV-Bromo- and A -chloro-substiluted alkyl- and arylamines. -amides, and -imides, A -chloro-A,-methylamine, A -bromo-A -methylamine, A -chloro-A, /V-dimethylamine, A-bromo-A.A-dimethylamine, ACV-dichloro-A -methylamine, V,fV-dibromo-,V-mcthylaminc, A -bromosuccinimide, -V-chlorosuccinimide, Af-bromoacct-amide, A.A -dichlorourethane, can be used in the reaction instead of the hypohalites. The reactions with various alkenes conducted in dichloromethane at room temperature in the presence of boron trifluoride-diethyl ether complex produce bromofluoro and chlorofluoro addition products in 40-80 % yield. However, the reactions are complicated by the addition of A -halo-succinimides and Af.A-dichlorourcthane to the C = C bonds.58... 

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