Question

Some reactions of amines are given. Which one is not correct ?

• A.

  

• B. $CH_3CH_2NH_2 + HNO_2 \to CH_3CH_2OH + N_2$
• C. $CH_3NH_2+C_6H_5SO_2Cl \to CH_3NHSO_2C_6H_5$
• D. $(CH_3)_2NH+NaNO_2+HCl\to(CH_3)_2N-N=O$

Answer 1

The Correct Option is A

To determine which reaction is not correct among the given options, let's analyze each one carefully:

1. 

   This reaction is not clearly displayed here. However, we can infer that the image represents an incorrect reaction for comparison purposes with other options. This needs to be verified against the other reactions.

2. CH_3CH_2NH_2 + HNO_2 \to CH_3CH_2OH + N_2

   This reaction represents the reaction of a primary amine (ethanamine) with nitrous acid to produce an alcohol (ethanol) and nitrogen gas. This is a known and correct reaction characteristic of primary aliphatic amines.

3. CH_3NH_2+C_6H_5SO_2Cl \to CH_3NHSO_2C_6H_5

   This reaction is an example of sulfonamide formation where methylamine reacts with benzenesulfonyl chloride forming a sulfonamide. This reaction is also correct.

4. (CH_3)_2NH+NaNO_2+HCl\to(CH_3)_2N-N=O

   This reaction involves a secondary amine, dimethylamine, reacting with nitrous acid to form an N-nitroso compound (nitrosamine). This is a known and correct reaction mechanism for secondary aliphatic amines.

After analyzing all options, reactions in options 2, 3, and 4 are well-known and correct reactions. Therefore, the reaction designated with the image must be incorrect as it is not consistent with the expected outcomes of amine reactions.

The incorrect option is hence identified as the image option: