Question

Complete the following
CH2=CH2+Br2 CCL4​

Answer 1

Answer:

BrCH2-CH2Br

It will undergo halogenation by addition reaction.

Answer 2

Answer:

The reaction between CH2=CH2 and Br2 in CCl4 is a classic example of an addition reaction in which the unsaturated double bond in ethylene (CH2=CH2) reacts with the diatomic halogen molecule Br2 to form 1,2-dibromoethane. The solvent used in this reaction, carbon tetrachloride (CCl4), is a non-polar and stable solvent that facilitates the reaction and prevents unwanted side reactions.

Explanation:

• In this reaction, the pi bonding electrons in the ethylene double bond act as nucleophiles and attack the Br2 molecule, breaking the BrАBr bond and forming a cyclic bromine intermediate.
• This intermediate then opens to form a 1,2-dibromoethane molecule.
• The reaction between CH2=CH2 and Br2 in CCl4 is highly exothermic, and it is important to control the reaction conditions to avoid the formation of unwanted side products.
• This reaction is commonly used in organic synthesis to add halogens to alkenes and alkynes to form vicinal dihalides.
• The reaction between CH2=CH2 and Br2 in CCl4 is a simple and effective method for the addition of halogens to unsaturated hydrocarbons.
• It is a widely used reaction in organic chemistry and has many applications in the synthesis of natural and synthetic products.

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