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The decreasing order of nucleophilicity among the nucleophiles
(a) 
(b) CH3O-
(c) CN-
(d)
is
[AIEEE-2005]
- a)(d), (c) , (b) , (a)
- b)(a), (b), (c) , (d)
- c)(c) , (b) , (a) , (d)
- d)(b), (c) , (a) , (d)
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
The decreasing order of nucleophilicity among the nucleophiles (a) (b)...
The correct answer is option D
Conjugate base (nucleophile) is strong if acid is weak and vice-versa.
A) CH3O∣∣C−O− is a conjugate base of CH3O∣∣C−OH (I).
B) CH3O− is a conjugate base of CH3OH (II).
C) CN− is a conjugate base of HCN (III).
D) p−H3C−C6H4−SO2−O− is conjugate base of p−H3C−C6H4−SO2−OH(IV).
Order of acidic nature is IV>I>III>II.
Hence, the decreasing order of nucleophilicity is B>C>A>D.
Conjugate base (nucleophile) is strong if acid is weak and vice-versa.
A) CH3O∣∣C−O− is a conjugate base of CH3O∣∣C−OH (I).
B) CH3O− is a conjugate base of CH3OH (II).
C) CN− is a conjugate base of HCN (III).
D) p−H3C−C6H4−SO2−O− is conjugate base of p−H3C−C6H4−SO2−OH(IV).
Order of acidic nature is IV>I>III>II.
Hence, the decreasing order of nucleophilicity is B>C>A>D.
Most Upvoted Answer
The decreasing order of nucleophilicity among the nucleophiles (a) (b)...
Nucleophilic means electron riched ,
as in cynide, nitrogen atom has lone pair so, it is most electron riched
in CH3O- oxygen is electron riched
in (a) option i.e in acetic acid oxygen is electron riched but electrons are involved in resonance.
In last i.e d option carbon is sp2 hybridised and involved in resonance with benzene ring and sulphur trioxide so nucleophilic character shown least by it.
as in cynide, nitrogen atom has lone pair so, it is most electron riched
in CH3O- oxygen is electron riched
in (a) option i.e in acetic acid oxygen is electron riched but electrons are involved in resonance.
In last i.e d option carbon is sp2 hybridised and involved in resonance with benzene ring and sulphur trioxide so nucleophilic character shown least by it.
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Community Answer
The decreasing order of nucleophilicity among the nucleophiles (a) (b)...
The correct answer is option D
Conjugate base (nucleophile) is strong if acid is weak and vice-versa.
A) CH3O∣∣C−O− is a conjugate base of CH3O∣∣C−OH (I).
B) CH3O− is a conjugate base of CH3OH (II).
C) CN− is a conjugate base of HCN (III).
D) p−H3C−C6H4−SO2−O− is conjugate base of p−H3C−C6H4−SO2−OH(IV).
Order of acidic nature is IV>I>III>II.
Hence, the decreasing order of nucleophilicity is B>C>A>D.
Conjugate base (nucleophile) is strong if acid is weak and vice-versa.
A) CH3O∣∣C−O− is a conjugate base of CH3O∣∣C−OH (I).
B) CH3O− is a conjugate base of CH3OH (II).
C) CN− is a conjugate base of HCN (III).
D) p−H3C−C6H4−SO2−O− is conjugate base of p−H3C−C6H4−SO2−OH(IV).
Order of acidic nature is IV>I>III>II.
Hence, the decreasing order of nucleophilicity is B>C>A>D.
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The decreasing order of nucleophilicity among the nucleophiles (a) (b) CH3O-(c) CN-(d) is[AIEEE-2005]a)(d), (c) , (b) , (a)b)(a), (b), (c) , (d)c)(c) , (b) , (a) , (d)d)(b), (c) , (a) , (d)Correct answer is option 'C'. Can you explain this answer?
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