Organic Chemistry Some Basic Principles and Techniques - Result Question 37

####43. Which of the following carbocations is expected to be most stable?

[2018] (a)[Y]C1[C+]C=C(N+[O-])C=C1

(c)[Y]C1C=CC=C[C+]1N+[O-]

(b)[Y]C1C=CC+C=C1

(d)[Y]C1[C+]C=CC(N+[O-])=C1

Show Answer

Solution:

  1. (d) −NO2 group is meta-directing group

(Less stable due to more e−withdrawing effect of −NO2 )

(More stable due to less e−withdrawing effect of NO2 ) greater no. of resonating structures.

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