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QJEEM05Chc55f: JEE Main 2005 Chemistry - Class 11 JEEM05Chc55f Solution: The decreasing order of nucleophilicity among the nucleophiles

The decreasing order of nucleophilicity among the nucleophiles

AIEEE 2005 Chemistry - Basics of Organic Chemistry Question 223 English

Multiple Choice Options

  • A (C),(B),(A),(D)\left( C \right),\left( B \right),\left( A \right),\left( D \right)
  • B (B),(C),(A),(D)\left( B \right),\left( C \right),\left( A \right),\left( D \right)
  • C (D),(C),(B),(A)\left( D \right),\left( C \right),\left( B \right),\left( A \right)
  • D (A),(B),(C),(D)\left( A \right),\left( B \right),\left( C \right),\left( D \right)

Step-by-Step Verified Solution

Strong bases are generally good nucleophile. If the nucleophilic atom or the centre is the same, nucleophilicity parallels basicity, i.e., more basic the species, stronger is the nucleophile. Hence basicity as well as nucleophilicity order is AIEEE 2005 Chemistry - Basics of Organic Chemistry Question 223 English Explanation

Now CN– is a better nucleophile than CH3O–. Hence decreasing order of nucleophilicity is

\left( C \right)>\left( B \right)>\left( A \right)>\left( D \right)

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