What reactions in organic chemistry require liquid bromine and what uses bromine water

Bromine water can be used in organic chemistry for substitution reactions, such as excess concentrated bromine water reacts with phenol to form tribromophenol [white precipitate] addition reactions, such as olefins and alkynes can fade bromine water.

In organic chemistry, liquid bromine can be used for substitution reactions, such as benzene and liquid bromine under the condition of iron as catalyst to produce bromobenzene [soluble in benzene] addition reactions, such as addition with olefins and alkynes.

There is also an important law in chemistry to remember: similarity and dissolution. That is, substances with the same spatial structure and molecular polarity can dissolve with each other.

Liquid bromine is a pure substance and bromine water is a mixture.

Liquid bromine is a dark brown-red heavy liquid, which is volatile and can freeze into a solid when the temperature is low. It is extremely toxic and corrosive.

Bromine water, a mixture of bromine elemental and water. Bromine is soluble in water, and more than 80% of bromine will react with water to form hydrobromic acid and hypobromic acid, but there will still be a small amount of bromine dissolved in water, so bromine water is orange-yellow.

If you want a high concentration, you must use liquid bromine, if the reaction can be carried out at a low concentration, you can use bromine water, the concentration of bromine in the bromine water is very low, almost less than 1mol l, so some reactions need low concentrations can not have liquid bromine liquid bromine is pure bromine.

Generally used for addition reactions, bromine water is used; For substitution reactions, liquid bromine is used, because the side reactions caused by pure substances are less than those caused by bromine water.

Containing carbon-carbon double bonds and carbon-carbon triple bonds, bromine water can be used, and concentrated bromine water can be used for reaction with phenol solution.

Bromine water, a mixture of bromine elemental and water.

In secondary school chemistry, the functional groups that can react with bromine water are:

1. Carbon-carbon double and triple bonds.

The addition reaction occurs H2=CH2+BR2=CH2BR-CH2BR

2. Aldehyde group.

The redox reaction occurs H2O+BR2+CH3COH CH3COOH+2HBR

3. Phenol.

A substitution reaction occurs. br

HO—benzene ring—CH3 + 2BR2 HO—benzene ring—CH3 (white precipitate) +2HBR

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In secondary school chemistry, the functional groups that can react with bromine water are:

1. Carbon-carbon double and triple bonds.

The addition reaction occurs H2=CH2+BR2=CH2BR-CH2BR

2. Aldehyde group.

The redox reaction occurs H2O+BR2+CH3COH CH3COOH+2HBR

Organic chemical reactions mainly occur on functional groups, which play a decisive role in the properties of organic matter, -X, -OH, -CHO, -COOH, -NO2, -SO3H, -NH2, RCO-, these functional groups determine the chemical properties of halogenated hydrocarbons, alcohols or phenols, aldehydes, carboxylic acids, nitro compounds or nitrites, sulfonic acid organic compounds, amines, and amides in organic matter.

Chemical Properties:

Functional groups play a decisive role in the properties of organic matter, -X, -OH, -CHO, -COOH, -NO2, -SO3H, -NH2, RCO-, these functional groups determine the chemical properties of halogenated hydrocarbons, alcohols or phenols, aldehydes, carboxylic acids, nitro compounds or nitrites, sulfonic acid organic compounds, amines, and amides in organic matter.

Therefore, learning the nature of organic matter is actually learning the nature of functional groups, and organic matter containing any functional group should have the chemical properties of this functional group, and organic matter that does not contain such functional groups does not have the chemical properties of this functional group, which is a point that should be recognized in the study of organic chemistry.

The above content reference: Encyclopedia - Functional Group.

In secondary school chemistry, the functional groups that can react with bromine water are:

1. Carbon-carbon double and triple bonds.

The addition reaction occurs H2=CH2+BR2=CH2BR-CH2BR2, aldehyde group.

The redox reaction occurs H2O+BR2+CH3COH CH3COOH+2HBR

3. Phenol pickpocket.

A substitution reaction occurs.

Brho—benzene ring—CH3 + 2BR2 HO—benzene ring—CH3 (white precipitate) +2HBR

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An unsaturated bond in an organic molecule reacts with bromine water and fades it;

The type of unsaturated bond: carbon-carbon double bond will make 1mol br2 fade in the title. 2-methyl-1,3-butadiene, means fraction.

If there are two carbon-carbon double bonds in the seed, the 2mol br2 will fade.

Carbon-carbon triple bonds will fade 2mol br2.

Benzene (containing similar 3 carbon-carbon double bonds) will make 3mol br2 fade, 1, the ratio of the amount of organic matter to bromine is 1:2, then it means that there is one carbon-carbon triple bond or two carbon-carbon double bonds in the substance, then, only bc in the answer is eligible, 2, methyl-1, 3-butadiene.

CH2=C(CH3)-CH=CH2+2BR2=BR2CBR(CH3)-CHBR+CH2BR,1, [Fundamentals of Organic Chemistry in Senior 2] Reaction of organic matter with bromine water.

The following organic matter reacts with a sufficient amount of bromine water, and the ratio of the amount of organic matter to bromine is 1:2 (bc).

Methyl-2-butene butyne methyl-1,3-butadiene,3-butanediyne.

I'm a novice in chemistry, mainly because I don't have an idea of this question

<>1. Bromine and water do not react, and bromine is dissolved in water to form bromine water;

2. Bromine water refers to a mixed solution of bromine elemental matter dissolved in water;

3. The concentration of 80% bromine will react with water to form hydrobromic acid and hypobromic acid, and a small amount of bromine will still be dissolved in water, so the bromine water is orange-yellow;

4. The new bromine water is an aqueous solution of bromine, which carries out a chemical reaction related to bromine element, and the bromine molecules in the bromine water for a long time will decompose, and the bromine water will gradually fade;

5. The long-stored bromine water only contains hypobromic acid, which will decompose into hydrobromic acid and oxygen under light.

Liquid bromine is suitable for substitution reactions with hydrocarbons.

Both liquid bromine and bromine water can be used in addition reactions.

and phenol substitution is concentrated bromine water.

The reaction with benzene is liquid bromine.

Remember the last two.

Key liquid bromine is generally used for the removal of impurities of unsaturated hydrocarbons in the main topic.

If you want a high concentration, you must use liquid bromine, and if the reaction can be carried out at a low concentration, you can use bromine water, which has a very low concentration of bromine, almost less than 1mol l

Therefore, some reactions require low concentrations to have liquid bromine.

Liquid bromine is pure bromine.

Bromine water can be used in organic chemistry for substitution reactions, such as excess concentrated bromine water reacts with phenol to form tribromophenol [white precipitate] addition reactions, such as olefins and alkynes can fade bromine water.

In organic chemistry, liquid bromine can be used for substitution reactions, such as benzene and liquid bromine under the condition of iron as catalyst to produce bromobenzene [soluble in benzene] addition reactions, such as addition with olefins and alkynes.

There is also an important law in chemistry to remember: similarity and dissolution. That is, substances with the same spatial structure and molecular polarity can dissolve with each other.

Bromine water, a mixture of bromine elemental and water.

<>1. Bromine and water do not react, and bromine is dissolved in water to form bromine water;

2. Bromine water refers to a mixed solution of bromine elemental matter dissolved in water;

3. The concentration of 80% bromine will react with water to form hydro-polycobromic acid and hypobromoic acid, and there will still be a small amount of bromine elemental dissolved in water, so the bromine water is yellow in orange;

4. The new bromine water is an aqueous solution of bromine, which carries out a chemical reaction related to bromine element, and the bromine molecules in the bromine water for a long time will decompose, and the bromine water will gradually fade;

5. The bromine water with a long-term hood nucleus only contains hypobromic acid, which will be decomposed into hydrobromic acid and oxygen under light.