The reaction between benzyl bromide and sodium cyanide
In the ancient times, those who have learned the way of chemistry have studied the reaction between benzyl bromide (Benzyl Bromide) and sodium cyanide (Sodium Cyanide). Benzyl bromide is active in nature and is widely used in organic synthesis. Sodium cyanide has strong toxic properties, but it is also an essential agent in chemical reactions.

When the two are encountered, it should be as follows: The bromine atom of benzyl bromide is active and good to separate, and the cyanogen ion ($CN ^ - $) of sodium cyanide is nucleophilic, and the two attract. The cyanogen ion attacks the carbon position of benzyl bromide, and the bromine ion leaves, and then forms benzyl cyanide. The corresponding formula can be expressed as: $C_6H_5CH_2Br + NaCN\ longrightarrow C_6H_5CH_2CN + NaBr $.

This should be in the field of organic synthesis and is of great significance. Benzonitrile can be used as the starting material for many types of organic compounds. If hydrolyzed, phenylacetic acid can be obtained, which is an important raw material for medicine and fragrance. However, sodium cyanide is highly toxic, and those who operate it must be cautious to prevent it from leaking and causing disasters.

Ancient scholars, in the study of chemistry, are not afraid of difficulties, carefully observe physical properties, and understand the principles, paving the way for the progress of later chemistry. Today's people should also pursue their ambitions and study the field of chemistry diligently to open up new frontiers of science.