Which of the following will be most stable diazonium salt \text{RN}_{2}^{+}\text{X}^{-}?

  • Option 1)

    \text{CH}_{3}\ \text{N}_{2}^{+}\text{X}^{-}

  • Option 2)

    \text{C}_{6}\text{H}_{5}\ \text{N}_{2}^{+}\text{X}^{-}

  • Option 3)

    \text{CH}_{3}\ \text{CH}_{2}\ \text{N}_{2}^{+}\text{X}^{-}

  • Option 4)

    \text{C}_{6}\text{H}_{5}\ \text{CH}_{2}\ \text{N}_{2}^{+}\text{X}^{-}

 

Answers (1)

As we learnt in

Fate of aromatic diazonium ion -

Diazonium salts of aromatic amines are comparatively more stable and evolve nitrogen only on heating.These diazonium salts can be isolated at low temperatures.

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This diazonium salt is stable because positive charge can participate in resonance.

 


Option 1)

\text{CH}_{3}\ \text{N}_{2}^{+}\text{X}^{-}

This option is incorrect.

Option 2)

\text{C}_{6}\text{H}_{5}\ \text{N}_{2}^{+}\text{X}^{-}

This option is correct.

Option 3)

\text{CH}_{3}\ \text{CH}_{2}\ \text{N}_{2}^{+}\text{X}^{-}

This option is incorrect.

Option 4)

\text{C}_{6}\text{H}_{5}\ \text{CH}_{2}\ \text{N}_{2}^{+}\text{X}^{-}

This option is incorrect.

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