Match List-I with List-II
|
List-I |
List-II |
|
(A) Wurtz-Fittig reaction |
(I) \( CH_3COCl \) and Anhyd. \( AlCl_3 \) |
|
(B) Chiral |
(II) Swarts reaction |
|
(C) Friedel-Crafts Acylation |
(III) Alkylarene |
|
(D) Freons |
(IV) Non-superimposable mirror images |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
The list mixes reactions of haloalkanes and haloarenes with one stereochemical term. Each reaction is identified by its reagents and the product it gives; each term by its definition.
(A) Wurtz-Fittig reaction — This matches (III) Alkylarene. An aryl halide and an alkyl halide are treated with sodium in dry ether; the aryl and alkyl groups join, giving an alkylarene such as toluene.
\( \displaystyle \ce{C6H5Br + CH3Br + 2Na} \xrightarrow{\text{dry ether}} \ce{C6H5CH3 + 2NaBr} \)
(B) Chiral — This matches (IV) Non-superimposable mirror images. A chiral object or molecule cannot be superimposed on its mirror image; a carbon with four different groups, as in butan-2-ol, makes a molecule chiral.
(C) Friedel-Crafts Acylation — This matches (I) \(CH_3COCl\) and Anhyd. \(AlCl_3\). Anhydrous aluminium chloride, a Lewis acid, generates the acylium ion \( \ce{CH3CO+} \) from acetyl chloride, which substitutes into the ring.
\( \displaystyle \ce{C6H6 + CH3COCl} \xrightarrow{\text{anhyd. }\ce{AlCl3}} \ce{C6H5COCH3 + HCl} \)
(D) Freons — This matches (II) Swarts reaction. Freons are chlorofluorocarbons; freon-12 is made from tetrachloromethane by halogen exchange with a metallic fluoride such as \( \ce{SbF3} \), which is the Swarts reaction.
\( \displaystyle \ce{3CCl4 + 2SbF3 -> 3CCl2F2 + 2SbCl3} \)
Shortcut: (A)-(III) and (B)-(IV) appear in Options (1) and (4); (C)-(I) then leaves only Option (1).