Question

Написать равнение реакций и указать, какие с них есть качествиными на алкены. CH2=CH-CH3+H2O CH2=CH-CH3+H2 CH2=CH-CH3+Br2 CH2=CH-CH3+KMnO4

Answer 1

1) CH2=CH-CH3 + HOH -> CH3-CHOH-CH3

2) CH2=CH-CH3 + H2 -> CH3-CH2-CH3

3) CH2=CH-CH3 + Br2 -> CH2Br-CHBr-CH3

4) 3CH2=CH-CH3 +2 KMnO4+ 4H2O -> 3CH2OH-CHOH-CH3 +2 KOH + 2MnO2↓

Ответ: 3) и 4) - качественные.

Answer 2

Equation 1: CH2=CH-CH3 + H2O

The reaction between an alkene (CH2=CH-CH3) and water (H2O) is known as hydration. In this reaction, the alkene undergoes addition of water across the double bond, resulting in the formation of an alcohol.

The balanced equation for this reaction is:

CH2=CH-CH3 + H2O → CH3-CH(OH)-CH3 [[1]]

Equation 2: CH2=CH-CH3 + H2

The reaction between an alkene (CH2=CH-CH3) and hydrogen gas (H2) is known as hydrogenation. In this reaction, the alkene undergoes addition of hydrogen across the double bond, resulting in the formation of an alkane.

The balanced equation for this reaction is:

CH2=CH-CH3 + H2 → CH3-CH2-CH3 [[2]]

Equation 3: CH2=CH-CH3 + Br2

The reaction between an alkene (CH2=CH-CH3) and bromine (Br2) is known as halogenation. In this reaction, the alkene undergoes addition of bromine across the double bond, resulting in the formation of a dibromoalkane.

The balanced equation for this reaction is:

CH2=CH-CH3 + Br2 → CH2Br-CHBr-CH3 [[3]]

Equation 4: CH2=CH-CH3 + KMnO4

The reaction between an alkene (CH2=CH-CH3) and potassium permanganate (KMnO4) is known as oxidative cleavage. In this reaction, the alkene undergoes cleavage of the double bond, resulting in the formation of two carbonyl compounds.

The balanced equation for this reaction is:

CH2=CH-CH3 + KMnO4 → CH3-CO-CH3 + HCOOH [[4]]

Please note that these reactions are general representations and may not account for specific reaction conditions or stereochemistry.