1. Tardigrade
  2. Question
  3. Chemistry
  4. CH3-Br + Nu- arrow CH3 - Nu + Br- The decreasing order of the rate of the above reaction with nucleophiles (Nu-) A to D is [Nu- = (A) PhO- , (B) AcO- , (C) HO-, (D) CH3O- ]

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Q. $CH_3-Br + Nu^{-} \rightarrow CH_3 - Nu + Br^{-}$ The decreasing order of the rate of the above reaction with nucleophiles ($Nu^-$) A to D is $[Nu^{-} = (A) \, PhO^{-} , (B) \, AcO^{-} , (C) \, HO^{-}, (D) CH_3O^{-} ]$

Haloalkanes and Haloarenes

Solution:

$PhO^{-}$ is less resonance stabilized than $AcO^-$ ion and hence is a stronger nucleophile than $AcO^-$. Therefore, the overall nucleophilicity decreases in the order:
$CH_3O^{-} (D) > HO^{-} (C) > PhO^{-} (A) > AcO^{-} (B)$ Therefore, option (a) is correct.