In which of the following compound, lone pair of N is not involved in resonance?

Question

In which of the following compound, lone pair of N is not involved in resonance? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

Option a can also be re-drawn as- <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/cc286a2b6e7de7e81b36bc0b3b96dbb0-.png" /> N is at bridge head here π -bond can't be formed as it violates BREDT'S RULE

Q. In which of the following compound, lone pair of N is not involved in resonance?

Option a can also be re-drawn as-

$N$ is at bridge head $&$ here $π$ -bond can't be formed as it

violates BREDT'S RULE

Q. In which of the following compound, lone pair of N is not involved in resonance?

Option a can also be re-drawn as- N is at bridge head & here π -bond can't be formed as it violates BREDT'S RULE

Option a can also be re-drawn as-

$N$ is at bridge head $&$ here $π$ -bond can't be formed as it

violates BREDT'S RULE