What does co mean?

1. commander (commanding officer)

Carbon monoxide is a carbon-oxygen compound with chemical formula of CO and molecular weight of 28.0 10 1. Usually, it is a colorless, odorless and tasteless gas. Physically, carbon monoxide has a melting point of -205℃ and a boiling point of-19 1.5℃, and is insoluble in water (the solubility in water at 20℃ is 0.002838g), so it is not easy to liquefy and solidify.

Chemically, carbon monoxide is both reducing and oxidizing, and oxidation reaction (combustion reaction) and disproportionation reaction can occur. At the same time, it is poisonous. High concentration can cause people to have different degrees of poisoning symptoms, endangering human brain, heart, liver, kidney, lung and other tissues, and even die like an electric shock. The minimum lethal concentration for human inhalation is 5000ppm(5 minutes).

In industry, carbon monoxide is the basis of carbon monoxide chemistry, which can be prepared by coke oxidation and other methods, and is mainly used for the production of methanol and phosgene and organic synthesis.

2. Chemical properties

Carbon monoxide is an unsaturated metastable molecule. As far as decomposition is concerned, it is chemically stable. At room temperature, carbon monoxide does not react with acids, bases, etc. However, it can form an explosive mixture when mixed with air, and it can cause combustion and explosion when exposed to open flame and high temperature. It is a flammable and explosive gas.

Because the valence of carbon element in carbon monoxide molecule is +2, it can be oxidized to +4, which is reduction; And can be reduced to the oxidized low valence state.

3. Application area

In the chemical industry, carbon monoxide is the basis of one-carbon chemistry. Carbon monoxide is the main component of synthetic gas and all kinds of gas, and it is also an important raw material for synthesizing a series of basic organic chemical products and intermediates. Starting from carbon monoxide, almost all basic chemicals can be prepared, such as ammonia, phosgene, alcohol, acid, anhydride, ester, aldehyde, ether, amine, alkane and olefin.

At the same time, various homogeneous reaction catalysts for organic chemical production can be prepared by using the property that carbon monoxide reacts with transition metals to form carbonyl complex metals or carbonyl complex metal derivatives. In addition, carbon monoxide can be used as a terminator for polyethylene polymerization.