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NTA Abhyas JEE Main2020ChemistryAminesPractice

Identify the product (P) and (Q) in the reactions. R X + A g C N → P + A g X ; R X + K C N → Q + K X

Options

  1. A(P) → RCN, (Q) → RCN
  2. B(P) → RCN, (Q) → RNC
  3. C(P) → RNC, (Q) → RCN
  4. D(P) → RNC, (Q) → RNC

Correct answer

C. (P) → RNC, (Q) → RCN

Step-by-step solution

R X + A g C N → R N C P + A g X R X + K C N → R C N Q + K X Both C and N can donate electron pairs. Since KCN is predominantly ionic and C - C bond is more stable than C - N bond in case of KCN, attack takes place through carbon atom. AgCN is predominantly covalent hence only nitrogen pair is available for bonding resulting in formation of isocyanide.

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