Bromine dioxide

Most material on bromine compounds is discussed under oscillating reactions. Pulse radiolysis of aqueous solutions of bromate gives the dioxide Br02. This is reduced by hexacyanoferrate(II) and phenoxide in clean, fast reactions. Reductions by manganese(II) and phenol are slower and more complex as complications arise from dimerization of BrOi to give Br204, 

Oxidation by periodate of octacyanotungstate(IV) and chromium(III) has been reported. The latter reaction involves a second-order dependence on Cr(III), interpreted in terms of an inner-sphere mechanism in which I(VII) bridges two Cr(III) centers. 

Species containing iodine in formal oxidation six have been formed by photolysis and radiolysis of aqueous iodate and periodate, equations (26)-(29). The products formed in (28) and (29) depend upon pH, being 

The oxidation of iodide by the following complexes has been studied [AuCU], [AuBr4] Ni(III) Cu(III) together with the redox reactions of I2 and (SCN)2 radical ions with tris(2,2 -bipyridine) complexes of Os(II) and Os(III). The oxidation by iodine of A -acetylmethionine methyl ester is catalyzed by carboxylic acid buffers, in a complicated reaction involving the formation of a carboxylic acid anhydride.  

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Bromine bromate, 0276 Bromine dioxide, 0258 Bromine perchlorate, 0235 Bromine trioxide, 0259 Bromyl fluoride, 0239 Chlorine dioxide, 4042 Chlorine perchlorate, 4101 Chlorine trifluoride oxide, 3982 Chlorine trioxide, 4044 Chloryl hypofluorite, 3973 Chloryl perchlorate, 4104 Dichlorine oxide, 4095 Dichlorine trioxide, 4100 Dicyanogen AW -dioxidc. 0998 Dioxygen difluoride, 4320 Fluorine perchlorate, 3976 Hexaoxygen difluoride, 4327 Iodine dioxide trifluoride, 4334 Iodine(V) oxide, 4627 Iodine(VII) oxide, 4628 Oxygen difluoride, 4317 Perbromyl fluoride, 0240 Perchloryl fluoride, 3974... 

There is no evidence of the existence of bromine dioxide beyond H. Hammerer s 10 unverified statement that in the distillation of 4 per cent, bromic acid, the distillate in some cases contains less oxygen than corresponds with bromic acid, and had the atomic ratio Br 02. If this be the case, the product soon decomposes into bromic acid and bromine or hydrogen bromide. 

Ans. (a) Bromine dioxide and b) nitrogen trichloride. In Br02, O is above Br but to its left in the periodic table. In NCI3, N is above Cl and to its left. When this situation arises with oxygen or fluorine, that element is written last any other such pair has the element to the left written first. That is the reason for the order of naming in Br02 and NCI3. 

Bromine dioxide, BrOg, is a yellow solid below —40° above it is unstable. Prepared in a similar way to F2O2, it is less explosive than ClOg. Hydrolysis gives bromide and bromate ... 

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