A) IV > II > I > III
B) I > II > III > IV
C) II > I > IV > III
D) I > IV > III > II
Correct Answer: B
Solution :
The order of stability of carbocation is \[{{3}^{o}}\] benzylic \[>{{2}^{o}}\] benzylic \[>{{2}^{o}}>{{1}^{o}}.\] Thus, the correct order of stability will be \[Ph-\underset{I}{\overset{Ph}{\mathop{\underset{+}{\overset{|}{\mathop{C}}}\,}}}\,-C{{H}_{2}}C{{H}_{3}}>PhC{{H}_{2}}C{{H}_{2}}-\underset{(II)}{\overset{H}{\mathop{\underset{+}{\overset{|}{\mathop{C}}}\,}}}\,-Ph\]\[>P{{h}_{2}}CH-\underset{(III)}{\mathop{\underset{Me}{\overset{H}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,}}\,+>Ph-\underset{(IV)}{\mathop{\underset{Ph}{\overset{Me}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,}}\,-\underset{+}{\mathop{C}}\,{{H}_{2}}\]You need to login to perform this action.
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