Write down the reaction equation by which aneline can be obtained from ethane.

Solution:
1. Let’s compose a chain of transformations for organic substances:
C2H6 – C2H4 – C2H2 – C6H6 – C6H5 – NO2 – C6H5 – NH2;
2. Let us write down the reaction equations:
С2Н6 = Н2 + Н2С = СН2 – ethane dehydrogenation reaction, ethylene was obtained;
H2C = CH2 = H2 + C2H2 – dehydrogenation of ethylene, acetylene is released;
2C2H2 = C6H6 – trimerization is possible with heating and the participation of a carbon catalyst, benzene is obtained;
C6H6 + HO – NO2 = C6H5 – NO2 + H2O – nitration, occurs with the participation of sulfuric acid as a dehydrating agent, nitrobenzene is formed;
С6Н5NO2 + 6Н = С6Н5 – NH2 + 2H2O – reduction of nitrobenzene occurs when heated to 300 degrees, aniline is obtained;
The given reactions show the connection of saturated hydrocarbons with nitrogen-containing organic substances. The end product of the aniline transformation chain is used industrially as a base for the synthesis of dyes.