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[Chemical Knowledge]：Reagent for distinguishing between cyclobutane and butene

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Reagent
to distinguish between cyclobutane and butene
Cyclobutane and butene are common organic compounds, which have some obvious differences in chemical properties. In order to further understand their differences and characteristics, we need to use some specific reagents for testing.

1. Aqueous bromine
Aqueous bromine can be used to distinguish between cyclobutane and butene. Cyclobutane and butene were dropped separately in two test tubes, and then a small amount of aqueous bromine solution was added. The color change in the test tube was observed. If the liquid in the test tube changes from colorless to orange or reddish brown, it means that the butene has been brominated and the cyclobutane has not.

2. Potassium permanganate solution
Potassium permanganate solution can be used to distinguish between cyclobutane and butene. Cyclobutane and butene were dropped in two test tubes respectively, and then a small amount of potassium permanganate solution was added. The color change in the test tube was observed. If the solution changes from purple to blue-green, it means that the butene has been oxidized and the cyclobutane has not been reacted.

3. Ferric trichloride solution
Ferric trichloride solution can be used to distinguish between cyclobutane and butene. Cyclobutane and butene were dropped separately in two test tubes, and then a small amount of ferric chloride solution was added. The color change in the test tube was observed. If the solution changes from yellow to purple, it means that the addition reaction of butene has occurred and the reaction of cyclobutane has not occurred.

By observing the reaction of the above reagents, we can distinguish the characteristics of cyclobutane and butene. Cyclobutane is a saturated hydrocarbon with relatively stable chemical properties and is not prone to chemical reactions. Butene is a kind of olefin, which has strong activity and is easy to react with other substances such as addition, bromination and oxidation.

summary: the difference between cyclobutane and butene reagent bromine aqueous solution, potassium permanganate solution and ferric chloride solution. By observing their reactions with cyclobutane and butene, we can understand their differences and characteristics. These reagents have important applications in chemical experiments, helping us to better understand the properties and characteristics of organic compounds.

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