NEETChemistryHaloalkanes and Haloarenes
Match List-I with List-II regarding the reaction of an alkyl halide ( R - X ) with different reagents. List-I (Reagent) List-II (Major Product) (A) KCN (I) Alkyl isocyanide (B) AgCN (II) Alkyl cyanide (C) KNO ₂ (III) Nitroalkane (D) AgNO ₂ (IV) Alkyl nitrite Choose the correct answer from the options given below:
Options
- A(A)-(II), (B)-(I), (C)-(IV), (D)-(III)
- B(A)-(I), (B)-(II), (C)-(IV), (D)-(III)
- C(A)-(II), (B)-(I), (C)-(III), (D)-(IV)
- D(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
Correct answer
A. (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
Step-by-step solution
Cyanide and nitrite ions are ambident nucleophiles. KCN is predominantly ionic and provides cyanide ions in solution. Although both carbon and nitrogen atoms are in a position to donate electron pairs, the attack takes place mainly through the carbon atom to form alkyl cyanides (A-II). AgCN is mainly covalent in nature and nitrogen is free to donate an electron pair, forming alkyl isocyanides as the major product (B-I). Similarly, KNO ₂ is an ionic compound and the attack occurs through oxygen, resulting in alkyl n