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[Chemical Knowledge]：The difference between alkene and benzene and its application field

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Alkene and benzene are common organic compounds, which have obvious differences in chemical structure and properties. Olefins are a class of organic compounds containing one or more carbon-carbon double bonds in the carbon chain, while the benzene ring is an aromatic ring composed of six carbon atoms. Below we will introduce the difference between alkene and benzene and its application fields in detail.

1. structural differences:
1. Structure of the alkene: The alkene has a carbon-carbon double bond, which allows the carbon atom to split other atoms in two, and therefore has a high chemical reactivity. The chemical structure of olefins can be divided into conjugated alkenes and non-conjugated alkenes. Conjugated alkene is composed of two or more double bonds of alkene, which makes the electron cloud distributed in the whole conjugated system and has stronger stability.
2. Benzene structure: Benzene ring refers to a macrocycle formed by six carbon atoms through the sharing of electrons, in which each carbon atom is connected to only one hydrogen atom. The benzene ring is aromatic, that is, the bonding electrons are shared throughout the ring and form a conjugated system. This gives the benzene ring exceptional stability and reactivity.

2. physical properties difference:
1. the physical properties of alkene: alkene colorless and odorless, mostly gas or liquid, but some advanced alkene substances are solid. Because olefins contain carbon-carbon double bonds, they have high volatility, activity and unsaturation, and are easy to react.
2. The physical properties of benzene: benzene is a colorless liquid with a special aromatic smell and low volatility. The aromatic nature of benzene makes it highly stable and difficult to react with other substances.

3. application field differences:
1. olefin application field: olefin is widely used in chemical industry, medicine, pesticide, dye, synthetic rubber and other fields. For example, ethylene is an important raw material for the production of plastics; butadiene can be used to synthesize synthetic rubbers and elastomers.
2. Application field of benzene: Benzene is widely used as solvent, raw material and reaction intermediate. It is also an important starting material for the synthesis of many organic compounds and derivatives. In addition, benzene is also used in the manufacture of chemical fibers, pigments, fragrances and pharmaceuticals.

To sum up, there are obvious differences between alkene and benzene in structure, physical properties and application fields. Their different characteristics make them play different roles in chemistry, medicine, materials and other fields. Through in-depth research and application, we can better use and develop these compounds, and promote scientific progress and industrial development in related fields.

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