Which of the following haloalkanes can undergo elimination reaction to form an a

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Question: Which of the following haloalkanes can undergo elimination reaction to form an alkene? (2021)

Options:

Correct Answer: 2-bromobutane

Exam Year: 2021

Solution:

2-bromobutane can undergo elimination to form an alkene due to the presence of a beta-hydrogen.

Which of the following haloalkanes can undergo elimination reaction to form an alkene? (2021)

Which of the following haloalkanes can undergo elimination reaction to form an alkene? (2021)

Step 1: Identify the haloalkanes given in the question.
Step 2: Understand what an elimination reaction is. It is a reaction where a molecule loses atoms or groups, forming a double bond (alkene).
Step 3: Recognize that for a haloalkane to undergo elimination, it must have a beta-hydrogen. A beta-hydrogen is a hydrogen atom on the carbon adjacent to the carbon that has the halogen (bromine in this case).
Step 4: Look at 2-bromobutane. It has a bromine atom attached to the second carbon. Check the adjacent carbon (the first carbon) for hydrogen atoms.
Step 5: Confirm that the first carbon has hydrogen atoms (beta-hydrogens). This means 2-bromobutane can lose the bromine and a hydrogen to form an alkene.
Step 6: Conclude that 2-bromobutane can undergo elimination to form an alkene because it has beta-hydrogens.

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