Question

How many bromo products are formed when ethane is reacted with excess of Br₂ on heating?

Answer 1

Correct Answer: 9

Reaction Overview:

When ethane (C₂H₆) is reacted with excess bromine (Br₂) under heating, substitution reactions occur, replacing hydrogen atoms with bromine atoms. This leads to multiple brominated products. 

Step-by-Step Explanation:

1. Monobromo Product:
   • Only one product: C₂H₅Br (Bromoethane).
2. Dibromo Products:
   • Two possible isomers:
     • 1,1-Dibromoethane (both Br atoms on the same carbon).
     • 1,2-Dibromoethane (Br atoms on different carbons).
3. Tribromo Products:
   • Three possible isomers:
     • 1,1,1-Tribromoethane.
     • 1,1,2-Tribromoethane.
     • 1,2,2-Tribromoethane.
4. Tetrabromo Products:
   • Two possible isomers:
     • 1,1,1,2-Tetrabromoethane.
     • 1,1,2,2-Tetrabromoethane.
5. Pentabromo Product:
   • Only one product: 1,1,1,2,2-Pentabromoethane.
6. Hexabromo Product:
   • Only one product: C₂Br₆ (Hexabromoethane).

Total Number of Products:

Adding all the possible isomers:

• Monobromo: 1 product
• Dibromo: 2 products
• Tribromo: 3 products
• Tetrabromo: 2 products
• Pentabromo: 1 product
• Hexabromo: 1 product

Total = 1 + 2 + 3 + 2 + 1 + 1 = 9 products.

Conclusion:

The total number of bromo products formed is 9.