La obținerea anilinei din nitrobenzen cu sistem reducător (Fe + HCl), pot avea loc reacțiile:
C<sub>6</sub>H<sub>5</sub>-NH<sub>2</sub> + Fe → compus colorat verde
C<sub>6</sub>H<sub>5</sub>-NO<sub>2</sub> + 6e<sup>-</sup> + 6H<sup>+</sup> → C<sub>6</sub>H<sub>5</sub>-NH<sub>2</sub> + 2H<sub>2</sub>O
C<sub>6</sub>H<sub>5</sub>-NH<sub>3</sub>]<sup>+</sup>Cl<sup>-</sup> + NaOH → C<sub>6</sub>H<sub>5</sub>-NH<sub>2</sub> + NaCl + H<sub>2</sub>O
C<sub>6</sub>H<sub>5</sub>-NH<sub>2</sub> + HCl → C<sub>6</sub>H<sub>5</sub>-NH<sub>3</sub>]<sup>+</sup>Cl<sup>-</sup>
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