BrFs Bromine fluoride

The actual composition present in the Br2/BrF3 mixture is not known, and any fluorination reaction may be a composite reaction of BrF, BrF3 and BrF5. It is not necessary to assume that BrFa is the reactive constituent, although this is probable. Consider the fluorination of a species X—a metal, oxide, oxysalt, halide, etc.—to the fluoride XF by a mixture of bromine fluorides BrFgj. The general reaction is... 

Bromine Fluorides. The following compds are described in the literature Bromine monofluori.de, BrF, mw 98.92, red-bra unstable gas, fr p -33°, bp 20° is formed from the ttifluoride bromine (Ref 2). Bromine trifluoride, BrFg, mw 136.92, col to gray-yel liq, ft p 8.8°, bp 135°, d 2,49 at 135° is formed from fluorine and bromine or HBr (Ref 2). Bromine pentafluori.de, BrFg, mw 174.92, col liq, fr p -61.3°, bp 40.5°, d 2.47 at 25°, vap d 6.05 is formed from the elements at 0°(Ref 2). Sax(Ref 3) considers these compds to be dangerous when heated to decompn or on contact with an acid or acid fumes, since they emit highly toxic fumes of bromine fluorine they react with w or steam to produce heat, toxic and corrosive fumes... 

R2C—0 - R2CF2. This reaction has been carried out directly with diethyl-aminosulfur trifluoride (DAST, 6, 183-184). It can also be effected by reaction of hydrazones of aldehydes or ketones with bromine fluoride, BrF, generated in situ from NBS and Py(HF)n. Yields from reactions of hydrazones of ketone are in the range 30-95% the yield from reaction of the hydrazone of an aldehyde was 28%. 

Bil3 Bismuth(III) iodide, 4 114 2Bi(N03)3-3Mg(N03)2-24H20 Bismuth magnesium nitrate, 2 57 BrF Bromine (I) fluoride, 3 185 BrF3 Bromine(III) fluoride, 3 184 BrF5 Bromine (V) fluoride, 3 185 BrH Hydrobromic acid, 1 151, 152, 155... 

Bromine fluoride, BrF. BrF is conveniently formed from Br2 in C1,CF and used directly. 

The compound BrF can be prepared by fluorinating bromine not with elemental fluorine but with a higher bromine fluoride in a disproportionation reaction (equations 33 and 34). Fluorination of halides (equation 35) instead of elemental halogen is sometimes preferable, leading to purer products. Interhalogen compounds also include astatine ones such as AtCl, AtBr, and Atl. 

Electrostatic forces between two ions decrease by the factor 1/cP as their separation, d, increases. But dipole-dipole forces vary as l/r/. Because of the higher power of d in the denominator, l/r/ diminishes with increasing d much more rapidly than does l/d. As a result, dipole forces are effective only over very short distances. Furthermore, for dipole-dipole forces, q+ and q represent only partial charges, so these forces are weaker than ion-ion forces. Average dipole-dipole interaction energies are approximately 4 kj per mole of bonds. They are much weaker than ionic and covalent bonds, which have typical energies of about 400 kJ per mole of bonds. Substances in which permanent dipole-dipole interactions affect physical properties include bromine fluoride, BrF, and sulfur... 

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