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Question: Which of the following species is most stable ?...

Which of the following species is most stable ?

A

P−O2 N−C6H4−C+H2\mathrm { P } - \mathrm { O } _ { 2 } \mathrm {~N} - \mathrm { C } _ { 6 } \mathrm { H } _ { 4 } - \stackrel { + } { \mathrm { C } } \mathrm { H } _ { 2 }

B

C6H5−C+H2\mathrm { C } _ { 6 } \mathrm { H } _ { 5 } - \stackrel { + } { \mathrm { C } } \mathrm { H } _ { 2 }

C

P−Cl−C6H4−C+H2\mathrm { P } - \mathrm { Cl } - \mathrm { C } _ { 6 } \mathrm { H } _ { 4 } - \stackrel { + } { \mathrm { C } } \mathrm { H } _ { 2 }

D

P−CH3O−C6H4−C+H2\mathrm { P } - \mathrm { CH } _ { 3 } \mathrm { O } - \mathrm { C } _ { 6 } \mathrm { H } _ { 4 } - \stackrel { + } { \mathrm { C } } \mathrm { H } _ { 2 }

Answer

P−CH3O−C6H4−C+H2\mathrm { P } - \mathrm { CH } _ { 3 } \mathrm { O } - \mathrm { C } _ { 6 } \mathrm { H } _ { 4 } - \stackrel { + } { \mathrm { C } } \mathrm { H } _ { 2 }

Explanation

Solution

Positive charge on is despersed due to electron repelling nature of methoxy group.