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NEET2023ChemistryHaloalkanes and HaloarenesActual

Which amongst the following reaction of alkyl halides produces isonitrile as a major products? (A) R - X + HCN (B) R - X + AgCN (C) R - X + KCN (D) R - X + NaCN H ₂ O C ₂ H ₅ OH Choose the most appropriate answer from the options given below

Options

  1. A(B) only
  2. B(A) and (B) only
  3. C(D) only
  4. D(C) and (D) only

Correct answer

A. (B) only

Step-by-step solution

KCN is predominately ionic and provides cyanide ions in solution. Although both carbon and introgen atoms are in a position to donate electron pairs, the attack takes place mainly through carbon atom and not through nitrogen atom since C - C bond is more stable than C - N bond. However, AgCN is mainly covalent in nature and nitrogen is free to donate electron pair forming isocyanide as the major product R - X + AgCN R - NC + AgX

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