Simple chemical tests bromine

The addition of bromine has been used as a simple chemical test for the presence of olefinic double bonds. A solution of bromine in carbon tetrachloride is a clear, deep... 

Bromination is a simple chemical test for the presence of n bonds in unknown compounds. 

Hexane Extraction and Bromination. Some of the fluorescent enones are extractable from the amorphous regions of the polymer matrix by cold hexane (1,13). This prpcess enables us to perform a simple chemical test for the presence of unsaturation, i.e., bromination (18). Figure 4 shows the fluorescence excitation and emission spectra of the cold hexane extract of commercial polypropylene before and after treatment with bromine. After bromination there is a significant reduction in the fluorescence intensity, confirming the presence of unsaturation. A similar result was obtained on brominating a cold hexane extract of poly-4-... 

The addition of bromine to the double bond is useful as a simple chemical test for alkenes. Brj is red while the product of its addition to an alkene is colorless. This allows one to easily detect by a color change whether some unknown sample is an alkene. If the red color of bromine persists when bromine is added to an unknown, the unknown does not contain a double bond. If the red color disappears, the unknown contains a double bond. 

The addition of bromine has been used as a simple chemical test for the presence of olefinic double bonds. A solution of bromine in carbon tetrachloride is a clear, deep red color. When this red solution is added to an alkene, the red bromine color disappears (we say it is decolorized ), and the solution becomes clear and... 

Bromination is a simple chemical test for the presence of 7t bonds in unknown compounds. When bromine, a fuming red liquid, is added to an alkene dissolved in the solvent CCI4, the bromine adds to the double bond and the red color disappears. The disappearance of the red color is therefore a positive test for 7t bonds. 

The return, reverse peak is smaller than the forward peak if the CV of the Brj, Br couple is run with allyl alcohol in solution I pc a [bromine], where pc = peak, cathodic . The fact that Ipc is smaller than Ipo implies that some fraction of the electrogenerated bromine has been consumed by the chemical reaction between Br2 and allyl alcohol the CV thus contains evidence of an EC reaction. Figure 6.19 below shows the cyclic voltammogram for the EC reaction between bromine and allyl alcohol, while Table 6.5 lists a series of simple diagnostic tests for an EC reaction. 

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