Q.
How many of the following alkyl halides CANNOT be prepared by Finkelstein reaction?
$CH _{3}\left( CH _{2}\right)_{2} Cl , CH _{3}\left( CH _{2}\right)_{3} Br , CH _{3}\left( CH _{2}\right)_{3} I$,
$CH _{3} CH \left( CH _{3}\right) CH _{2}- Cl , PhCH _{2} Br , PhCH _{2} CH _{2} I$
Haloalkanes and Haloarenes
Solution:
Only alkyl iodides can be prepared from corresponding alkyl chlorides and bromides by Finkelstein reaction.
