Alkyl Halides - Result Question 22

####22. KI in acetone, undergoes SN2 reaction with each P,Q,R and S. The rates of the reaction vary as

(2013 Adv.)

P

Q

R

(a) P>Q>R>S

(b) S>P>R>Q

(c) P>R>Q>S

(d) R>P>S>Q

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Solution:

  1. PLAN Acetone is an aprotic solvent and can dissolve both the nucleophile and the substrate and thus SN2 reaction is favoured. Also

SN2213 Alkyl halides  SN1

Q.

Thus, reactivity order is S>P>R>Q



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