Organic Chemistry Basics Result Question 3
3. The increasing order of nucleophilicity of the following nucleophiles is
(1) $\mathrm{CH} _3 \mathrm{CO} _2^{\ominus}$
(2) $\mathrm{H} _2 \mathrm{O}$
(3) $\mathrm{CH} _3 \mathrm{SO} _3^{\ominus}$
(4) $\stackrel{\ominus}{\mathrm{O}} \mathrm{H}$
(a) (1) $<$ (4) $<$ (3) $<$ (2)
(b) (2) $<$ (3) $<$ (1) $<$ (4)
(c) (4) $<$ (1) $<$ (3) $<$ (2)
(d) (2) $<$ (3) $<$ (4) $<$ (1)
(2019 Main, 10 April II)
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Answer:
Correct Answer: 3. ( c )
Solution:
- Higher the basicity of a base, stronger will be its nucleophilic power.
Again we know, a weaker acid produces a stronger base (conjugate), i.e. a stronger nucleophile.
Thus, the correct order of nucleophilicity of given nucleophiles are as follows :
$\mathrm{H}_2 \mathrm{O}(2)<\mathrm{CH}_3 \mathrm{SO}_3^{-}(3)<\mathrm{CH}_3 \mathrm{CO}_2^{-}(1)<\overline{\mathrm{O}} \mathrm{H}(4)$
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