Ncert Exercises & Solutions

Which of the following alkyl halides will undergo $S_{N} 1$ reaction most readily?

1. ${(C H_{3})}_{3} C - F$

2. ${(C H_{3})}_{3} C - C l$

3. ${(C H_{3})}_{3} C - B r$

4. ${(C H_{3})}_{3} C - I$

All the given compounds are tertiary alkyl halides but the bond formed between

carbon and iodine (C —|) bond is the weakest bond due to large difference in the size

of cartvon and iodine. So, (CH,),C—I gives $S_{N} 1$ reaction most ready. In other words,

iodine is a better leaving group.