Question
Chemistry Question on Organic Chemistry- Some Basic Principles and Techniques
The correct stability order for the following species is
A
(II)>(IV)>(I)>(III)
B
(I)>(II)>(III)>(IV)
C
(II)>(I)>(IV)>(III)
D
(I)>(III)>(II)>(IV)
Answer
(I)>(III)>(II)>(IV)
Explanation
Solution
The stability order of the given species is: I > III > II > IV
There is an increase in the stability of carbocations when an electron-donating group (+I effect) is present.
In 1st the lone pair on oxygen stabilizes the carbocation as well as it is tertiary carbocation, hence more stable.
The order of the stability of the carbocation is tertiary alkyl > secondary alkyl > primary alkyl> methyl carbonium ion.
