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Which of the following undergoes halofor...

Which of the following undergoes haloform reaction?
(i) `CH_(3)CH_(2)COCH_(2)CI` (ii) `C_(6)H_(5)COCH_(3)`
(iii) `C_(6)H_(5)COCHI_(2)` (iv) `CH_(3)CH_(2)COCCI_(3)`

A

only (ii)

B

(ii) and (iv)

C

(i), (ii) and (iv)

D

all the four

Text Solution

AI Generated Solution

The correct Answer is:
To determine which of the following compounds undergoes a haloform reaction, we need to identify if they contain a methyl ketone structure (RCOCH3) or a compound that can be converted into such a structure. The haloform reaction typically occurs with compounds that have the structure RCOCH3, resulting in the formation of haloforms (like chloroform, bromoform, etc.) when treated with halogens. Let's analyze each option: ### Step 1: Analyze the first compound `CH3CH2COCH2Cl` - This compound can be represented as a ketone (specifically, a secondary alcohol with a chlorine substituent). - When treated with halogens, it can undergo halogenation to form a trihalo compound. - This compound has a structure that can lead to the formation of a methyl ketone upon halogenation. - **Conclusion:** This compound can undergo a haloform reaction. ### Step 2: Analyze the second compound `C6H5COCH3` - This compound is a methyl ketone (specifically, acetophenone). - It has the structure RCOCH3, which is known to undergo the haloform reaction. - **Conclusion:** This compound can undergo a haloform reaction. ### Step 3: Analyze the third compound `C6H5COCH2` - This compound is a ketone but not a methyl ketone since it has a CH2 group instead of CH3. - When treated with halogens, it can form a trihalo compound, but it does not meet the criteria for a haloform reaction, as it does not have a methyl group directly attached to the carbonyl. - **Conclusion:** This compound does not undergo a haloform reaction. ### Step 4: Analyze the fourth compound `CH3CH2COCl3` - This compound has a carbonyl group with a trihalo substituent. - The presence of the trihalo group indicates it can undergo a haloform reaction. - **Conclusion:** This compound can undergo a haloform reaction. ### Final Conclusion: Based on the analysis: - Compounds (i), (ii), and (iv) undergo a haloform reaction. - Compound (iii) does not undergo a haloform reaction. ### Answer: The compounds that undergo haloform reactions are: - (i) `CH3CH2COCH2Cl` - (ii) `C6H5COCH3` - (iv) `CH3CH2COCl3`
To determine which of the following compounds undergoes a haloform reaction, we need to identify if they contain a methyl ketone structure (RCOCH3) or a compound that can be converted into such a structure. The haloform reaction typically occurs with compounds that have the structure RCOCH3, resulting in the formation of haloforms (like chloroform, bromoform, etc.) when treated with halogens. Let's analyze each option: ### Step 1: Analyze the first compound `CH3CH2COCH2Cl` - This compound can be represented as a ketone (specifically, a secondary alcohol with a chlorine substituent). - When treated with halogens, it can undergo halogenation to form a trihalo compound. - This compound has a structure that can lead to the formation of a methyl ketone upon halogenation. ...
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